6'^^ GLOSSARY . 



Anteorhital plate — The plate, in front of the ej'c, in serpents. 



Antrorse — Turned forwards. 



Anus — The external opening of the intestines. 



Arterial bulb — The muscular swelling, at the base of the great 



artery, in fishes, etc. 

 Articidated— Jointed. 

 Artiodactylous — Even-toed (toes 2 or 4.) 

 Attenuate — Long and slender, as if drawn out. 

 Auricle — The large lobe of the external ear; also, one of the 



chambers of the heart. 

 Barbel — An elongated fleshy projection, usually about the head, 



in fishes. 

 Basal — Pertaining to the base ; at or near the base. 

 Beak — The bill of birds, or (in other animals) any beak-like 



structure. 

 Bend of Wing — Angle at the carpus when the wing is folded. 

 Bicolo r — Two-colored. 

 Booted — Said of the tarsus, when its scales coalesce and form a 



continuous envelope. 

 Braneliim — Gills ; respiratory organs of fishes, etc. 

 Branddal — Pertaining to the gills. 

 BrancMostegals — The bony rays supporting the branchiostegal 



membranes, under the head of a fish, below the opercular 



bones, and behind the lower jaw. 

 Bristle — A stiff hair, or hair-like feather. 

 Caducous — Falling off early. 



Calcareous — Containing or composed of carbonate of lime. 

 Canines — The teeth behind the incisors — the "eye-teeth"; in 



fishes, teeth in the front part of the jaws, longer than the 



others. 

 Carapace — The upper part of the shell of a turtle. 

 Carinate — Keeled, having a ridge along the middle line. 

 Carpus — The wrist. ' 



Caudal — Pertaining to the tail. 

 Caudal fin — The fin on tlie tail of fishes. 

 Caudal peduncle — The region between the anal and caudal fins in 



fishes. 

 Cavernous — Containing cavities, either empty or filled with a 



mucous secretion. 



