GLOSSARY. 321 



Cere Fleshy, cutaneous or membranous covering of the base of 

 the bill in many birds, particularly the Owls, Hawks, and 

 Parrots. 



Cervical Pertaining to the neck. 



Chiasma Crossing of the fibres of the optic nerve. 



Chin The space between the forks of the lower jaw. 



Ciliated Fringed with eye-lash-like projections. 



Cinereous Ashy in color. 



Clamatorial Pertaining to or like the Clamatores. 



Clavicle The collar bone. 



Coseal Of the form of a blind sac. 



Caecum An appendage of the form of a blind sac, connected with 

 the alimentary canal. 



Commissure The line on 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. 



Costal folds Folds of the skin (of a Salamander) showing the 

 position of the ribs. 



Crest In birds, any lengthened feathers about the head; else- 

 where, any elevated or crest-like projection. 



Crissum The under tail coverts, in birds. 



Ctenoid Rough-edged, said of scales when the posterior margin 

 is minutely spinous or pectinated. 



Culmen The middle line or ridge of the upper mandible in birds. 



Cuneate Wedge-shaped ; said of a bird's tail when the middle 

 feathers are longest and the rest regularly shorter. 



Cycloid Smooth-edged ; said of scales not ctenoid, but concen* 

 trically striate. 



Deciduous Temporary, falling off. 



Decurved Curved downward. 



Dentate With tooth-like notches. 



Dentirostral Having the bill notched near its tip. 



Depressed Flattened vertically. 



Depth Vertical diameter (usually of the body of fishes.) 



Dermal Pertaining to the skin. 



Diaphanous Translucent. 



Digitigrade Walking on the toes, like a dog. 



Dorsal Pertaining to the back. 

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