D); the ambulacra thus formed are continuous from the peristome to the apical system of plates; the hydropore is connected with a definite plate of that system, and thus marks a secondary bilateral symmetry.
Grooves and peristome protected by small plates, which can open over the grooves.
The peristome of the ovate shell bears an odd large foot with three terminal branches and three cruciate rudimentary feet.
From the peristome of the thorny campanulate shell arise six large descending feet, which are studded with arborescent fragile lateral branches, and armed at the distal end with stouter dichotomous terminal branches.
When moist theperistome closes hygrometrically over the orifice more or less; when drier the teeth or processes commonly bend outward or recurve; and then the spores more readily escape.
Summit of an open spore-case of a Moss, which has a peristome of 16 pairs of teeth.
Some of the outer and of the innerperistome (consisting of jointed teeth) much magnified.
Aurata, column at base golden, peristome intenser yellow with crimson flush, tentacles grey with ochreous and white spots.
During each forward movement the column is arched downwards so that the peristome is in contact with the surface along which the animal is moving.
In common with all Coelenterate animals, the walls of the columnar body and also the tentacles and peristome of Actinia are composed of three layers of tissue.
Other mesenteries, called incomplete, are not attached to the stomodaeum, and their internal margins are free from the peristome to the basal disk.
Genae bare or with but one range of setae; vibrissal ridges less converging; peristome narrow; arista long plumose.
Peristome narrow; no pteropleurals, two sternopleurals; two orbitals in the female; second segment not elongate; the fourth with two well developed discal macrochaetae.
The collar (called the peristome by Cohn) is evidently formed, like the valve, by an inward projection of the walls of the bladder.
The peristome is single, and consists of sixty-four teeth.
The left peristome margin in some cases grows over the peristome depression toward the right, thus making a sort of cover for the peristome.
The peristomeis broad and triangular, the base of the triangle being the entire anterior end of the body.
The anterior half of the body Genus Balantidium tapers to nearly a point in front; the peristome is narrowest at the apex; the mouth is the entireperistome base.
Right margin of peristomestraight Genus Oxytricha as far as the anterior end; 5 rows ventral cirri; 5 anal cirri Right margin of peristome curved 7 7.
The peristome is well-marked by the adoral zone, and upon its right border there is a row of cilia, and a similar row of cilia runs along the base of the oral membranelle.
The peristome is long and rather narrow and carries an undulating membrane on its right margin.
Upon the left edge of the peristome is a high, undulating membrane, sail-like in appearance when extended.
No torsion in the peristome; Genus Blepharisma undulating membrane is confined to the posterior part of peristome 3.
Peristome circular in outline; Genus Stentor limited to the anterior end 2.
The mouth is small and situated in the hollow of the peristome near the left border.
Bütschli, following Quennerstedt, describes an undulating membrane on each side of the peristome groove.
Peristome reduced to left edge and Family Aspidiscidæ does not reach over the anterior One genus, *Aspidisca margin * Presence at Woods Hole indicated by asterisk.
The rest of the right edge of the peristome is occupied by closely approximated powerful cilia (Bütschli) or a second undulating membrane (Stein).
On the right border of the peristome is an undulating membrane.
The peristome begins as a shallow furrow at the center of the ventral surface and dips sharply into the buccal depression, which is deep and turned toward the posterior end.
Aperture somewhat semicircular and oblique, small; peristome slightly expanded; umbilical callosity yellowish or pellucid whitish, defined towards the base of the columellar margin.
They also have the peristome brown, and the basal band is darker.
Peristome simple, a little thickened along the basal margin, with the extremities united by a thin callus.
Aperture obliquely lunate; peristome simple, thin, slightly thickened and reflexed partly over the perforation.
Between the epistome and peristome is a groove, the mouth or vestibule, which leads into the body.
Note the contraction and extension of the stalk, the movements of the cilia of peristome and epistome, the flowing or streaming of the fluid endosarc (indicated by the movements of the food vacuoles), the behavior of the contractile vesicle.
Peristome slender, semitubular, straight and vertical, nearly as long as the shell, with three pointed teeth, an odd longer terminal and two paired shorter lateral.
Margin of the peristome with four divergent, short, triangular teeth, the two dorsal teeth half as long as the two ventral.
Coronal of the peristome with the same number of short, divergent feet, alternating with the larger pores.
Peristome on the dorsal corner with a single simple vertical tooth, which is nearly straight, conical, with two sharp lateral edges on the base, about half as long as the shell.
Peristome with six very large divergent feet, which are about as long as the shell, cylindrical, irregularly curved.
The peristome bears a double marginal ring of divergent conical spines, the upper being directed upwards, the lower downwards.
Peristome with a single vertical, straight, conical tooth, diametrically opposite to the apical spine and of the same length.
Peristome slightly constricted, with nine slender divergent feet of the same length.
A genus founded on a species of PUPA, which has the peristome slightly reflected, and numerous plaits in the aperture.
Shell conical; aperture ovate; peristome incomplete, retrally, and furnished with a tooth on the pillar.
The peristome is relatively small and the mouth is generally raised on a projecting spout or hypostome.
In most Peritrichaceae a collar-like rim surrounds the peristome, and marks out a gutter from which the vestibule opens; the peristomecan be retracted, and the collar close over it.
Muller; the twisted end of the peristome indicating the position of the mouth.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "peristome" in a variety of sentences. We hope that you will now be able to make sentences using this word.
