There is an external ligament; the pallialsinus is well marked, but not very deep.
The posterior end of the shell is contracted and slightly bent; the pallial sinus is deep.
Boring forms with a reduced foot; shell elongated, with deep pallial sinus.
In siphonate forms thepallial muscle is not simple, but is indented posteriorly by a sinus formed by the muscles which retract the siphons.
Probe passed into the superior division of the sub-pallial chamber through the excurrent siphonal notch, and issuing by the side of the foot into the inferior division of the sub-pallial chamber.
The food of the Anodonta, as of other Lamellibranchs, consists of microscopic animal and vegetable organisms, brought to the mouth by the stream which sets into the sub-pallial chamber at the lower siphonal notch (e in fig.
Mantle extensively closed; a fourth pallial aperture behind the foot; siphons long and united; shell elongated, a spoon-shaped projection for the ligament on each valve.
In Anodonta these pallial tentacles are confined to a small area surrounding the inferior siphonal notch (fig.
Animal removed from its shell, a probe g passed into the sub-pallial chamber through the excurrent siphonal notch.
Two pallial sutures, siphons somewhat elongated and partially or wholly united.
In the Arcidae the pallial eyes are compound or faceted somewhat like those of Arthropods.
The sub-section we shall now treat of is without the pallial line sinuated.
The division Siphonida is divided into two sub-sections, those without and those with a pallial line sinuated.
Posteriorly the mantle forms a large pallial lobe under the pallial aperture.
The pallial cavity is always well developed, and contains the ctenidium, at least in part; ctenidium, except in Lophocercidae, of folded type.
Foot without parapodia; no pallial cavity, but always a single ctenidium situated on the right side between mantle and foot.
In the larva a nautiloid shell is developed which is coiled exogastrically, that is, dorsally, and the pallial cavity is posterior or ventral (fig.
Shell turriculated and siphonated, thick, each whorl with varices; foot broad and truncated anteriorly; pallialsiphon well developed; proboscis present.
Mantle with two posterior appendages; ctenidium large and capable of protrusion from pallial cavity.
Pallial cavity transformed into a lung; operculum horny; shell narrow and elongated.
Visceral mass and shell sinistral; inferior pallial lobe very prominent, and transformed into a branchia.
No ctenidia but pallial branchiae in a circle between mantle and foot.
In the latter a pallial siphon, a well-developed proboscis and an unpaired oesophageal gland are always present, in the former they are usually absent.
Scurria, with pallial branchiae in a circle beneath the mantle.
Visceral mass and shell conical; head flattened; pallial cavity aquatic, but without a branchia; genital apertures separated.
Under surface of the mantle-skirt forming the roof of the sub-pallial chamber.
In order to examine oysters bacteriologically, it is necessary to pay particular attention to the water in the pallial cavity, the contents of the alimentary canal, and the washings of the shell itself.
The next step was to demonstrate the length of time the bacilli of cholera remained alive in the pallial cavity and body of the oyster.
What is regarded as the dorsal side of the animal is its ventral side, because upon the former lies the pallial aperture and the anus, while the vitelline sac is also inserted there.
With this should be compared the similar view of the sub-pallial chamber of the Dibranchiate Sepia.
The principal vein is a vena cava passing backwards ventrally from the cephalic region and dividing into two afferent branchial veins, each of which receives a pallial and an abdominal vein.
The inferior margin of the mantle-skirt (mouth of the pallial chamber).
Arms united by membrane; funnel attached to mantle, dividing the pallial aperture into two.
The siphuncle does not communicate with the coelomic cavity; it is a simple vascular process of the mantle, whose cavity consists of a venous sinus, and whose wall contains a ramification of the pallial artery.
Letters as in that figure with the following additions-- e, points to the concave margin of the mantle-skirt leading into the sub-pallial chamber.
No viscero-pericardial pores are present on the surface of the pallial chamber, since in the Dibranchiata the viscero-pericardial sac opens by a pore into each nephridium instead of directly to the surface.
In the pallial cavity are situated one pair of gills in the Dibranchiata (fig.
The mantle-skirt is deeply produced posteriorly, forming a large sub-pallial chamber around the anus.
It should be noted as a difference between Nautilus and the Dibranchiates that in the former the nidamental gland (in the female) lies on that surface of the pallial chamber formed by the dependent mantle-flap (fig.
From this geniculate body a number of neurones extend to the pallial portion of the cerebrum, for in the reptilian brain the pallium is present.
The shells of mussels consist of two distinct layers; on the inner, which is often of a most beautiful pearly lustre, may be traced the simple pallial line and the impressions of the small anterior and the large posterior muscles.
The teeth are beautifully formed, the central ones numbering from one to three in each valve, and the pallial line is not sinuated.
Their valves are equal in size and very thin, the hinge has no teeth and the pallial line is sinuated.
The ligament is external, the hinge has usually three diverging teeth in each valve, and the pallial line is sinuated.
The muscular scars and the pallial line are distinctly seen on the inner surface, and a peculiar curved shelly plate projects from under the umbo of each valve.
The inner surface is pearly, the pallial line usually sinuated, and both valves are pitted for the reception of the somewhat stout internal cartilage.
In all the members of this family, as in the last, the pallial line of the shell is simple.
In the pallial cavity the gills are formed, in those groups in which they are present, as solid processes frequently ciliated.
It would seem however in most cases to arise as a solid mass of mesoblast cells at the hind end of the pallial cavity, which subsequently becomes hollowed out and divided into an auricle and ventricle.
The anus, though at first always symmetrical and ventral, subsequently, on the formation of the pallial cavity, opens into this usually on the right and dorsal side.
It gives rise to the pallial or branchial cavity, and receives also the openings of the digestive, generative and urinary organs.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "pallial" in a variety of sentences. We hope that you will now be able to make sentences using this word.
