110 CHECK LIST OF THE 



Epibranchials. The bones directly above the angle of the branchial arches. 



Epihyal. One of the hyoid bones. 



Epipleurals. Rays of bone attached to the ribs and anterior vertebra?, 



usually touching the skin in the vicinity of the lateral line. 

 Erectile. Susceptible of being raised or erected. 

 Erythrism. A peculiar reddish state of plumage. 

 Ethmoid. A median anterior bone of the skull. 



Eustachian tubes. Tubes connecting the inner ear with the pharynx. 

 Even (tail). Having all the feathers of equal length. 

 Exoccipitals. Two bones of the skull, one on each side of the foramen 



magnum. 

 Exoskeleton. Hard parts (scales, scutes, feathers, hairs) on the surface 



of the body. 



Exserted. Projecting beyond the general level. 

 Hxtra-limital. Beyond the limits. 



F. 



Facial. Pertaining to the face. 



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



Falciform. Curved like a scythe. 



Fauna. The animals inhabiting any region taken collectively. 



Femoral. Pertaining to the thigh, or proximal bone of the hinder leg. 



Ferruginous. 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. 



Fontanel. An unossified space on top of head covered with membrane. 

 Foramen. A hole or opening. 

 Foramen magnum. The aperture in the posterior part of the skull for the 



passage of the spinal cord. 

 Forehead. Frontal curve of head. 

 Forficate. Deeply forked ; scissors-like. 

 Fossoe (nasal). Grooves in which the nostrils open. 

 Fossorial. Adapted for digging. 



Frontal bone. Anterior bone on top of head, usually paired. 

 Fulcra. Rudimentary spine-like projections extending on the anterior 



rays of the fins of ganoid fishes. 

 Fuliginous. Sooty-brown. 

 Fulvous. Of a brownish yellow colour. 

 Furcate. Forked. 



Fuscous. Of a dark grayish-brown colour. 

 Fusiform. Spindle-shaped; tapering towards both ends, but rather more 



abruptly forward. 



