The interparietal is commonly distinct, and the parietals unite in a long sagittal suture, which is often developed into a crest.
The roof of the skull is partly formed by the large supra-occipital and frontals, but mainly by the parietals (fig.
The parietals send a pair of long processes forwards along the sides of the frontals.
The parietals are paired in Geckos and Chelonia alone among living forms, and in the extinct Ichthyosauria and some Theromorpha; in all other reptiles they are united.
The parietals and frontals, being membrane bones, are not comparable to the supra-occipital, in the way that the presphenoid and basisphenoid are to the basi-occipital.
In all living forms the parietals meet and there is no interparietal foramen, though this exists in Labyrinthodonts.
In the gigantic Polyonax they are drawn out into a pair of enormous horns, and the parietals and squamosals are greatly expanded behind.
The frontals and parietals on each side are united so as to form a pair of fronto-parietals, and a girdle-like sphenethmoid is present.
The supra-occipital is very large and rises up to meet the frontals, thus with the interparietal completely separating the parietals from one another.
In the skull the cranial cavity extends forwards between the orbits, and is closed in front by downgrowths from the frontals and parietals which meet the well-ossified alisphenoids and orbitosphenoids[82].
The parietals are small and enclose between them the interparietal foramen (fig.
The fronto-parietals are fused, and there is no sphenethmoid.
The occipital region of the skull is small, and the line of junction of the supra-occipital and parietals is raised into a prominent occipital crest.
This individual has a black snout with a white bar across the nasals and prefrontals, a white spot in the middle of the frontal, and a white band across the temporals and parietals that is bordered posteriorly by a black band.
In both specimens the tip of the snout is yellow; a broad yellow band on the parietals and temporals is bordered posteriorly by a black band on the nape.
The frontals and parietals show a peculiar mode of origin in the adder, differing from their origin in other Vertebrates.
So, too, the frontals and parietals of Teleosts developed independently of the cartilaginous skull, and belonged to the skeletal system of the skin, not to the true vertebral axial skeleton (pp.
The frontals develop in continuity with the orbitosphenoids, the parietals in continuity with the alisphenoids, and so have much resemblance with the vertebral neural arches which surround the spinal column (p.
He denied the resemblance of the frontal and nasal "vertebræ" to true vertebræ, pointing out that both parietals and frontals are bones specially developed for the purpose of roofing over and protecting the cerebrum.
Completing the three hinder cranial "vertebræ" and roofing in the brain are the supraoccipital, the parietals and the frontals.
The course of the sagittal suture is grooved, and above the angle of the occipital bone the parietals are depressed.
Vertical height above a line joining the deepest notches in the squamous border of the parietals 70 = 2.
The fossa is lateral to much of the adductor chamber; consequently muscles arising from the parietals passed ventrolaterally, parallel to the oblique quadrate ramus of the pterygoid, to their attachment on the mandible.
Changes in pattern that may have modified the origin of the adductors in Captorhinus were correlated with the increase in length of the parietalsand the reduction of the supratemporals.
Amphicoelous; parietals separate; but the nasal bones are fused together, and the clavicles are not dilated.
Amphicoelous; parietals separate; clavicles dilated and with a perforation near the ventral end.
Procoelous; parietals united; eyelids functional; clavicles expanded as in the true geckos which they resemble in other respects.
A frontal shield and a pair of parietals are well developed, although smaller than in an average V.
Mehely, from Bosnia and Herzegovina, is distinguished by a usually larger eye, the vertical diameter of which equals or a little exceeds its distance from the mouth, and the parietals are often broken up into small shields.
Parietals usually in contact with the frontal and separated from the supraoculars by small shields, but sometimes in contact with both, or separated from the frontal.
The squamosal bone is large and either in contact with the frontals and parietals or separated from them by a vacuity; the orbit is sometimes roofed over by bone.
Tailed batrachians, with the frontals distinct from the parietals and the palatines from the maxillary.
The origin of the parietals and frontals as paired bones in membrane reinforces this conclusion.
Trochocephaly (roundness of head) is due to partial synostosis of the frontals and parietalsin the centre of the coronal suture.
The parietals and interparietals are also dermal bones which are united by synostosis to form theparietals or side bones of the normal adult skull.
The head moderately elongated, and the parietals diverging from each other for a certain space as they rise upon the side of the head, enlarging the cerebral cavity and the frontal sinus.
The head moderately elongated, the parietals not approaching from their insertion, but rather diverging, so as to enlarge the cerebral cavities and the frontal sinuses; consequently giving to these dogs greater power of scent and intelligence.
In all these the large parietals meet along the median line of the skull.
In the closely related family of Spaniodontidæ the parietals are small and do not meet.
The neck and limbs are shorter than in the Giraffe, and the horns, longer than in Giraffa, are placed just above the orbit upon the frontal bones alone, instead of upon the boundary line of frontals and parietals as in Giraffa.
Forbes pointed out that in most of the New-World forms the parietals and the malars come into contact; in the Monkeys of the Old World they are hindered from coming into contact by the frontals and the alisphenoids.
The parietals meet above in a crest and are not excluded from the roof of the skull.
The roof of the skull is not at all formed by the parietals externally.
Here again the Zeuglodonts are more typically Mammalian, for in them the parietals have a normal development and situation, rising even into a median crest as in so many quadrupeds.
Measured across their middle from the temporo-parietal suture, the two parietals appear to be almost of equal size (left 82 mm.
It is in this connection that the above-described division in the parietals of the chimpanzee will prove of value.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "parietals" in a variety of sentences. We hope that you will now be able to make sentences using this word.
