GLOSSARY. 311 



hjected: thrown out. 

 Elliptical: oval. 

 Emarginate; notched. 



Epithelium: the membrane lining various internal cavi- 

 ties and free surfaces of animals. 

 Expansile: capable of being expanded or widened. 

 Extensile: capable of being lengthened or extended. 



Facet: a little surface or face. 



Fascicle; a. cluster. 



Filament: a thread or resembling a thread. 



Fission: division or cleaving. 



Flagellum (jplursd ^agella) : a little lash. 



Flexible: capable of being bent. 



Frond: a leaf of fern; the entire plant oi Lemna. 



Frontal: pertaining to the front. 



Frustule: the entire jdiatom, consisting of two valves 



and the hoop. 

 Furcate: forked. 



Gelatinous: like jelly or gelatine. 



Globule: a small spherical particle. 



Granular: formed of or resembling small grains, 



Granules: small grains. 



Hemispherical: half a sphere. 

 Hexagon: a figure with six sides and angles. 

 Hispid: rough, with short, stiff hairs. 

 Homogeneous: of the same kind throughout. 

 Hyaline: glass-like, transparent. 



Illoricaie: without a lorica. 



Imbricated: overlapping like shingles on a roof. 



Invested: clothed, covered. 



