Researches upon the venom of the rattlesnake : with an investigation of the anatomy and physiology of the organs concerned . erygoid and palate bones admit of considerable movement, so that thearches which they form can be widened or narrowed as circumstances may mobility of these parts is essential to the motions which raise and depressthe fang, and to the deglutition of the large animals upon which the snakes areaccustomed to prey. The poison fang, when at rest, projects downwards and backwards into themouth of the serpent. It is firmly anchylosed in the alveolar process, whichcr
Researches upon the venom of the rattlesnake : with an investigation of the anatomy and physiology of the organs concerned . erygoid and palate bones admit of considerable movement, so that thearches which they form can be widened or narrowed as circumstances may mobility of these parts is essential to the motions which raise and depressthe fang, and to the deglutition of the large animals upon which the snakes areaccustomed to prey. The poison fang, when at rest, projects downwards and backwards into themouth of the serpent. It is firmly anchylosed in the alveolar process, whichcrowns the summit of the shortened upper maxillary bone. Fig. 1, d, whose pecu-liar brevity is characteristic of venomous snakes. The superior maxillary bone isof a rather irregular triangular shape, abruptly cut ofi: below to form the alveolarsocket. One face of this bone is smooth, and looks inwards and slightly forwards. OF THE VENOM OF THE RATTLESNAKE. 7 A second looks forwards and outwards. This facet is smooth below/ but is exca-vated above into a deep fossa, which in the fresh snake is partially closed by Fio;. Portion of CKANinii of Ckotalus.—Right side. Osteology. Bones concerned in tlie movements of the fang, a,external pterygoid bone; b, internal pterygoid bone ; c, palatal bone; d, superior maxillary bone; e, lachrymalbone. soft tissues, but is still sufficiently remarkable as lying between the eye and the dry bone this large fossa opens upwards freely through the base of the bone,and thus separates the two surfaces by which the bone articulates with the ecto-pterygoid and lachrymal bones respectively. Anteriorly, the superior maxillarybone presents a rounded angle, from which diverge the two lateral sides justdescribed. Posteriorly, the superior maxillary exhibits a third face, which is flatonly half way down the bone, and terminates in an abrupt edge forming the poste-rior boundary of the alveolar socket. Anteriorly, and above, the maxillary bone arti
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Keywords: ., bookcentury1800, bookdecade1860, bookidresearch, booksubjectvenom
