FISH OF ONTARIO. 109 



Coverts. Small feathers hiding the bases of the quills. 



Cranial. Pertaining to the cranium or skull. 



Crest. In birds any lengthened feathers about the head ; elsewhere any 

 elevated or crest-like projection. 



Crissum. The under tail coverts in birds. 



Ctenoid. Rough-edged ; said of scales when the posterior margin is min- 

 utely 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 concentrically 

 striate. 



D. 



Deciduous. Temporary ; falling off. 



Decomposed. Separate; standing apart. 



Decurved. Curved downward. 



Dentary. The principal or anterior bone of the lower jaw, usually bear- 

 ing the teeth. 



Dentate. With tooth-like notches. 



Denticle. A little tooth. 



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. 



Desmognathous. United palate, as in the lower water birds (Loons, 

 Gulls, etc.). 



Diagnostic. Distinctively characteristic. 



Diaphanous. Translucent. 



Diaphragm. Muscular septum between thorax and abdomen. 



Diapophysis. Transverse process of a vertebra. 



Digitigrade. Walking on the toes like a dog. 



Distal. Remote from point of attachment. 



Dorsal. Pertaining to the back. 



Dorsal fin. The fin on the back of fishes. 

 / 



E. 



Emarginate. Slightly forked^, or notched at the tip ; abruptly narrowed or 

 notched toward the tip (said of quills). 



Endoskeleton. The skeleton proper; the inner bony framework of the 



body. 

 Enteron. The alimentarv canal. 



