GLOSSAET 



OP THE 



PpviisrciPAL Technical Terms 



USED IN THIS WORK.* 



Abdomen — Belly. 



Abdominal — Pertaining to the belly — said ot the ventral fins of 

 fishes when inserted considerably behind the pectorals, away 

 from the shoulder girdle. 



Abortive — Remaining or becoming imperfect. 



Acuminate — Tapering gradually to a point. 



Acute — Sharp-pointed. 



Adipose fin — A peculiar, fleshy, fin-like projection on the backs 

 of Salmons, Cat Fishes, etc., behind the dorsal fin. 



Air bladder — A sac filled with air, lying beneath the back-bone o. 

 fishes, corresponding to the lungs of the higher vertebrates 



Allantois — An organ of the embryo. 



Altrices — Birds reared in the nest and fed by the parents. 



Altricial — Having the nature of Altrices. 



Alula — The feathers attached to the "thumb " of a bird. 



Alveolar surface— A portion of the jaw of a turtle, wdiere the 

 teeth-sockets (alveola) might be expected to be. 



Amnion — An organ of the embryo. 



Amphicoelian — Biconcave — said of vertebra?. 



Anadromous—^'A\(\. of marine fishes which run up rivers to spawn. 



Anal — Pertaining to the anus or vent. 



Anal fin — The fin on the median line, behind the vent, in fishes. 



Anal plate — The plate, immediately in front of the vent, in ser- 

 pents. 



* In the preparation of this Glossary, the aiitlior has largely drawn from 

 Dr. Cones' " Glossary of the Technical Terms nsed in Descriptive Ornithology," 

 in Baird, Brewer and Ridgway's History of North American Birds, Vol. III. 

 pp. 535-560. 



(367) 



