. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. ANATOMY OF VERTEBRATES. 147 In the Pytlion, figs. 96 and 97, the basloccipltal, i, Is subhex- agonal, broadest anteriorly, smootli and concave above, suturally rough on each side, with a recurved pointed hypapophysis: the hinder facet forms the lower half of the occipital condyle, on eacl 96. Section ol tlio Skull of a Python side of which is a small sharp process. The basioccipital unites above with the exoccipital, 2, and alisphenoid, f,; and in front with the basisj)henoid, 5. The exoccipitals (2,2) are each pro- duce
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. ANATOMY OF VERTEBRATES. 147 In the Pytlion, figs. 96 and 97, the basloccipltal, i, Is subhex- agonal, broadest anteriorly, smootli and concave above, suturally rough on each side, with a recurved pointed hypapophysis: the hinder facet forms the lower half of the occipital condyle, on eacl 96. Section ol tlio Skull of a Python side of which is a small sharp process. The basioccipital unites above with the exoccipital, 2, and alisphenoid, f,; and in front with the basisj)henoid, 5. The exoccipitals (2,2) are each pro- duced backward into a peduncular process supporting a moiety of the upper half of the occipital condyle : at the outer side of the base of the peduncle is an obtuse process, forming the upper part of the ridge continued upon the basioccipital. The outer and fore part of the exoccipital expands, and is perforated by a slit for the eighth pair f>f nerves, articulates l^elow with the basioccipital, is excavated in front to lodge the petrosal cartilage where it articulates with the alisphenoid, and unites above with the superoccii)ital, 3. This is of a subrhomboidal form, sends a spine from its upi)er and hinder surface, expands laterally into oblong processes, is notched anteriorly and sends down two thin plates from its under surface, bounding on the mesial side the surface for the cerebellum, and by the outer side forming the inner and upper parts of the acoustic cavities. The superoccipital articulates below with the exoccipitals and alisphenoids, and in front with the parietal, liy which it is over- lapped in its whole extent. The occipital vertebra is as if it were sheathed in the expanded posterior outlet of the parietal one, the centrum resting on the oblique surface of that in front, and the anterior l^ase of the neural spine entering a cavity in and being- overlapped by that of the preceding neural spine: the analogy of this kind of ' emboitement' of the occipital in the p
Size: 2310px × 1082px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorowenrichard18041892, bookcentury1800, bookdecade1860
