54 GLOSSARY. 



Fos'sa navicula'ris (L. boat-like ditch). A dilatation of the 



male urethra ; the space between the fourchette and the 



commissure in the vulva of the female. 

 Fos'sa ovalis (L. oval depression). A depression in the septum 



of the heart which marks the position of the opening by 



which, during fcetal life, the right side of the heart com- 

 municates with the left. 

 Fos'sa scaphoi'dea (L. boat-shaped depression). Another name 



for the fossa of the helix. 

 Fos'sa triangula'ris (L. triangular depression). Another name 



for the fossa of the antihelix. 

 Fos'sa of vena cava (L. fossa, a ditch). The fissure in the 



liver in which the vena cava lies. 

 Fourchet'te (Fr. fork). A small fold connecting the labia of 



the vulva in the female. 

 Fo'vea ante'rior (L. anterior pit). A depression in the fourth 



ventricle of the brain. 

 Fo'vea centra'lis (L. central pit). A small depression in the 



yellow spot of the retina of the eye. 



Fo'vea hemiellip'tica (L. semi-elliptical pit). An oval depres- 

 sion in the roof of the vestibule of the ear. 

 Fo'vea hemisphe'rica (L. hemispherical pit). A small round 



depression in the vestibule of the ear. 

 Fo'vea ovalis (L. oval pit). Another name for the fossa ovalis 



of the heart. 

 Fovil'la (L.foveo, I keep warm, cherish). A name given to the 



fecundating liquor in the grains of pollen. 

 Frae'na (L. frcenum, a bridle). Applied to any connecting or 



restraining folds of membrane, as the fraena of the lips or 



of the ileo-csecal valve. 

 Fron'tal (L. frons, frontis, the forehead). A bone of the 



skull. Relating to the region of the forehead, as the 



frontal spine projecting anteriorly from the carapace in the 



Crustacea. 

 Frugi'vora (L. frux, frugis, fruit; voro, I devour). A group 



of the Cheiroptera, which comprises all the bats which live 



exclusively on fruits. 

 Fulcra (L. fulcrum, a support). Small scales or spines borne 



by the dorsal fins of some Ganoid fishes. 

 Fun'dus (L. the bottom or base of anything). Applied to the 



base of an organ, as the fundus of the bladder or uterus. 

 Fun'gifonn (L. fungus, a mushroom ; forma, form). A term 



applied to certain papillae of the tongue. 



