322 GLOSSARY. 



Dorsal fin The fin on the back of fishes. 



Emarginate Slightly forked or notched at the tip, or sometimes 



abruptly narrowed (said of quills.) 

 Endoskeleton The skeleton proper the inner bony framework of 



the body. 



Epignathous Having the bill hooked. 

 Erectile Susceptible of being raised or erected. 

 Even (Tail) having all the feathers of equal length. 

 Exoskeleton Hard parts on the surface of the body. 

 Exserted Projecting beyond the general level. 

 Facial Pertaining to the face. 

 Falcate Scythe-shaped ; long, narrow, and curved. 

 Falciform Curved, like a scythe. 

 Fasciated With broad colored bands. 



Fauna The animals inhabiting any region, taken collectively. 

 Ferrugineous Rusty red. 

 Fibula The small outer leg bone. 

 Filament Any slender or thread-like structure. 

 Filiform Thread-form. 

 Fissirostral Having the bill very deeply cleft, beyond the base of 



the horny part, as in the Swallows. 

 .ForeJiead Frontal curve of head. 

 Foramen A hole or opening. 

 Forficate Deeply forked. 



Fosses The grooves in which the nostrils of many birds open. 

 Fossorial Adapted for digging. 

 Fulcra Rudimentary spine-like scales extending up the fins of 



some fishes. 



Fuliginous Sooty or smoky brown. 

 Furcate Forked. 

 Fuscous Dark brown. 

 Fusiform Spindle-shaped ; tapering toward both ends but rather 



more abruptly forward. 

 Gape Opening of the mouth. 



Ganoid Scales or plates of bone covered by enamel. 

 Gastrosteges Band-like plates along the belly of a serpent. 

 Gills Organs for breathing the air contained in water. 

 GiU openings Openings leading to or from the branchiae. 

 Gill rakers A series of structures like comb-teeth in the mouth 



of some fishes. 



