The moths are of large or moderate size with the maxillae in a vestigial condition, no food being taken after the attainment of the perfect state.
In the other three families the maxillary palps are vestigialor obsolete.
The Lymantriidae resemble the Lasiocampidae in their hairy bodies ana vestigial maxillae, but the frenulum is usually present on the hindwing and the feelers are bipectinate only in the males.
The second maxillae are intimately fused together to form the labium, which consists only of a reduced mentum, bearing sometimesvestigial lobes and always a pair of palps.
The wings of the Lepidoptera may be said to dominate the structure of the insect; only exceptionally, in certain female moths, are they vestigial or absent (fig.
Prominent among these vestigial structures, as they are called, are those which smack of the sea.
Another typical vestigial structure is the plica semi-lunaris, the remnant of the nictitating membrane characteristic of nearly the whole vertebrate sub-kingdom.
Observations on vestigial structures in animals are sadly wanting; but they are certainly found in the horse, pig, sheep, and others.
Similarly, I will conclude by remarking that several other instances of the survival of vestigial structures in man have been alleged, which are of a still more doubtful character.
Front and back view of adult human sacrum, showing abnormal persistence of vestigial tail-muscles.
Now the organization of man presents so many vestigial structures thus referring to various stages of his long ancestral history, that it would be tedious so much as to enumerate them.
The following woodcut serves still further to show vestigialresemblances between the human ear and that of apes.
Wallace has sought to draw a refined distinction between this vestigial coating and the useful coating of quadrumanous animals, in the absence of the former from the human back.
Hence there are hundreds of thousands of instances of the most detailed correspondence, without there being any instances to the contrary, if we pay due regard to vestigial characters.
Darwin is disposed to regard it also as a vestigial feature.
Mandibles present in pupa, vestigial in imago; maxillae suctorial without specialization; first maxillae with lacinia, galea and palp.
Mandibles absent in imago, very exceptionally present in pupa; first maxillae nearly always without laciniae and often without palps, or only with vestigial palps, their galeae elongated and grooved inwardly so as to form a sucking trunk.
In the male of Phyllodromia the rudiment of a vestigial ovary becomes separated from the developing testis, indicating perhaps an originally hermaphrodite condition.
In some parasitic Hymenoptera there is only a single embryonic membrane formed by delamination from the blastoderm, while in a few insects, including the wingless spring-tails, the embryonic membranes are vestigial or entirely wanting.
The Corrodentia retain vestigial maxillulae and two pairs of Malpighian tubes, but the wings are somewhat specialized in the Copeognatha and absent in the degraded and parasitic Mallophaga.
But the vestigial jaws, numerous Malpighian tubes, and specialized wings of may-flies forbid us to consider the order as on the whole primitive.
First, I will take the teachings of vestigial organs and the arrangement of organs found in the vertebrate embryo.
Here, also, vestigialorgans are met with, which may leave no trace in the adult, but indicate organs which were functional in the near ancestor.
So it is generally with well defined vestigial organs found in the adult animal; they always indicate an organ which was functional in the near ancestor.
The only other line of evidence to be adduced in favour of the absolute stability of germ-plasm is that which is furnished by the high antiquity of some specific types, by the facts of atavism, and by the persistency of vestigial organs.
It is enough for all the requirements of his theory of heredity, that the substance in question should present the high degree of stability which the facts of atavism, persistence of vestigial organs, &c.
When reduction of the posterior plate of the upper cheek teeth occurs, enamel is first lost from the labial side of the tooth, thus leaving only a short vestigial plate on the lingual end of the crown.
Evolution may be arrested before complete loss has occurred, and that part of the enamel that remains forms a short, vestigial plate restricted to the lingual one-fourth or one-third of the wall.
In some burrowing rodents and others the eye is quite vestigial and even concealed beneath the skin.
The axis becomes particularly reduced, and the fin comes to be attached directly to the pectoral girdle by a number of basal pieces (Teleosts) probably representing vestigial rays (cf.
In various Teleosts the scales are vestigial (eel); in others (as in most electric fishes) they have completely disappeared.
For instance, he expressly contrasts such cases with those of vestigial or "rudimentary" structures, pointing out that they differ from vestigial structures in respect of their permanence.
Their centre is Africa south of the Sahara Desert, but besides the African continent there are vestigial black traces across southern Asia to the Pacific and also strong black outposts in the Americas.
Nevertheless, these are but vestigial traces which the ceaseless European inflow will ultimately eradicate.
Moreover, such a review serves to reveal the significance of rudimentary and vestigial structures, such as the human vermiform appendix and the serous and vascular folds connected with the same.
In the Malacostraca it is absent in the adult, or persists only in a vestigial condition, as in some Decapoda and Schizopoda.
Development shows that the glandular tube is mesoblastic in origin and is of the nature of a coelomoduct, while the end-sac is to be regarded as a vestigial portion of the coelom.
In the parasitic Rhizocephala and in a few Copepoda (Monstrillidae) the alimentary canal is absent or vestigial throughout life.
Its walls are supported by a pair of bones diverging from each other in a [70]-shaped manner; these are cartilaginous and vestigial in the Thylacine.
The shoulder girdle has lost the large coracoid of Monotremes; this bone has the vestigial character that it possesses in other Eutheria.
Anchippodus, a later form, still preserves the upper pair of first incisors in a vestigial form; the strong second incisors grew from persistent pulps.
Footnote B: May have toothpick size vestigial teeth in either jaw.
Similar vestigial teeth, 5-40 in number, sometimes occur in goosebeaked whales (p.
It was unnatural to his scheme of things, contrary to the law of his vestigial piety.
Another curious fact is brought out if instead of back-crossing the F1 female we back-cross the F1 male to a black vestigial female.
A fourth case is shown in the fruit fly, where an ebony fly with long wings is mated to a grey fly with vestigial wings (fig.
Their offspring are now of only two kinds, black vestigial and gray long.
The F1 female is back crossed (to right) to black vestigial male; and the F1 male is back crossed to black vestigial female (to left).
Another example where one of the contrasted characters is dominant is shown by the cross of Drosophila with vestigial wings to the wild type with long wings (fig.
If a blackvestigial male is crossed to a gray long-winged female (fig.
Diagram illustrating a cross between a fly (Drosophila ampelophila) with long wings and a mutant fly with vestigial wings.
If these are inbred they give 9 gray long, 3 gray vestigial, 3 ebony long, 1 ebony vestigial (figs.
If we only knew enough, we would, no doubt, discover a beneficial use for all the so-called vestigial organs.
The claim that human hair is vestigial is spoiled by the fact that there is none on the back where most abundant on simians.
One of the hybrids lacks barbels, one has a Semotilus-like barbel on the right side only, and one has a vestigial barbel on the right side and an anomalous barbel that is nearly terminal on the left upper lip.
Rhinichthys has barbels, Gila lacks them, and the hybrid has one vestigial barbel, on the right side.
Small vestigial bow of ribbon in a modern hat 55 52.
A barrister's gown showing the vestigial hood and its streamer.
Vestigial palps have been described in various species of Hemiptera, but the true nature of these structures is doubtful.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "vestigial" in a variety of sentences. We hope that you will now be able to make sentences using this word.
