GLOSSARY. 



Alveolar surface — That portion of the jaws where the teeth are 



usually found. 

 Amphiocelian — Said of those vertebrae that are concave at each 



end. 

 Anal — Pertaining to the anus. 



Anal plate — The plate or scale which covers the anus in front. 

 Anchylosed — Firmly united, as when bones are grown together. 

 Annulated — Ringed or banded transversely. 

 Anteorlital plate — That situated along the anterior margin of 



the eye, the largest dimension of which is vertical. 

 Areolate — Divided into small spaces which are bounded by parts 



difiering in color or structure. 

 Articular hone — The portion of the lower jaw which articulates 



with the quadrate. 

 Azygos — A plate directly behind the rostral. 

 BranchioB — Gills; the respiratory organs of fishes, etc. 

 Bridge — The bony or horny plates which unite the carapace and. 



plastron of turtles. 

 Canthus — Corner or angle. 

 Canthus rostralis — Corner or angle of snout. 

 Carapace — The dorsal shield of turtles; usually composed of 



bony plates covered by horny scales. 

 Carinate — Keeled or ridged longitudinally. 

 Carpus — The wrist bones connecting the forearm with the long 



bones of the hand. 

 Clavicle — The collar-bone or anterior inferior portion of the pec- 

 toral arch. It does not form part of socket for arm. 

 Cloacal aperture — Entrance into the cloaca, or chamber into 



which the rectum, and the genital and urinary organs open. 



