. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. OSSEOUS SYSTEM. (COMP. ANAT.) 833 The styloid &0wes(29)3 mere rudiments in the human skeleton, anchylosed with the rest of the temporal bone, of which they are called the " styloid process," in the water-breathing Vertebrata are distinct pieces interposed between the os hyoides and the base of the skull, serving to unite the former to the latter. The symplectic bones (31) seem to be peculiar to Fishes ; they accompany the transverse, and assist in connecting the articulation of the lower jaw with the pteryg
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. OSSEOUS SYSTEM. (COMP. ANAT.) 833 The styloid &0wes(29)3 mere rudiments in the human skeleton, anchylosed with the rest of the temporal bone, of which they are called the " styloid process," in the water-breathing Vertebrata are distinct pieces interposed between the os hyoides and the base of the skull, serving to unite the former to the latter. The symplectic bones (31) seem to be peculiar to Fishes ; they accompany the transverse, and assist in connecting the articulation of the lower jaw with the pterygo-palatine apparatus. The lower jaw, although in the adult human subject formed of a single piece, in the fatus consists of two lateral halves united by a symphysis, as it is perma- nently in many of the lower Quadru- peds. In Reptiles and Fishes, how- ever, each half consists of numerous pieces, to which distinct names have been given by the comparative anato- mist. In the Crocodile and most reptiles there are six in number, viz. the dental portion (34), in which are situated all the alveoli of the teeth, uniting with its fellow to form the symphysis of the jaw- The opercular, covering almost all the inner aspect of the jaw except in front. The angular (36) and the supra-angular (35), placed one above the other, reaching quite to the posterior extremity of the jaw. In the Crocodile they leave between them a conside- rable space occupied anteriorly by the end of the dental portion, and then by a large oval aperture. The articular (e), bearing the articular pro- cess, whereby the jaw is connected with the skull. Likewise another small and unimpor- tant plate of bone sometimes seen on the inner aspect of the inferior maxilla. In the Chondropterygious Fishes the lower jaw is made up of only one bone, the arti- cular, upon which the teeth are affixed: rudi- Fig. 446. Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanc
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