108 CHECK LIST OF THE 



Calcareous. Chalky. 



Canines. The teeth behind the incisors — the "eye teeth" in fishes; any 

 conical teeth in the front part of the jaws, longer than the others. 

 Canthus. Corner of the eye where the lids meet. 



Carapace. The upper shell of a Turtle, usually composed of bony plates 



covered by horny scales. 

 Cardiform. (Teeth.) Teeth coarse and sharp, like wool cards. 



Carinate. Keeled, haying a ridge along the middle line. 



Carotid. The great artery running to the head. 



Carpal angle. Prominence at the wrist-joint when the wing is closed. 



From this point to the end of the longest quill constitutes the 



"length of wing." 

 Carpus. The wrist. 

 Catadromous. Running down; said of fresh water fish which run down 



to the sea to spawn. 

 Caudal. Pertaining to the tail. 



Caudal fin. The fin on the tail of fishes and whales. 



Caudal peduncle. The region between the anal and caudal fins in fishes. 

 Cavernous. Containing cavities either empty or filled with a mucous 



secretion. 

 Centrum. The body of a vertebra. 

 Cephalic fins. Fins on the head of certain rays ; a detached portion of the 



pectoral. 

 Ceratobranchials. Bones of the branchial arches just below their angle. 

 Ceratohyal. One of the hyoid bones. 

 Cervical. Pertaining to the neck. 

 Chiasma. Crossing of the fibres of the optic nerve. 

 Chin. Space between the forks of the lower jaw. 

 Ciliated. Fringed with eyelash-like projections. 

 Cirri. Fringes. 

 Claspers. Organs attached to the ventral fins in tlic male of Sharks, Rays, 



etc. 

 Clavicle. The collar-bone, or lower anterior part of shoulder girdle not 



entering into socket of arm. 

 Cloaca. A common opening of genital, urinary and alimentary canals. 

 Commissure. The line upon which the mandibles of a bird are closed. 

 Compressed. Flattened laterally. 

 Condyle. Articulating surface of a bone. 

 Conirostral. Said of a bill like that of a Sparrow; conical in form and 



with the commissure angulated. 

 Coracoid. The principal bone. of the shoulder girdle in fishes; otherwise 



a bone or cartilage on the ventral side, helping to form the arm- 

 socket. 

 Costal folds, [-"olds of tlic .skin (of a S'alaniaiulcr) showing ihe position of 



the ribs (costae). 



