376 GLOSSARY. 



EctosafC. (Gr. CKT^S, outer ; vatf, flesh.) The outer layer of sar- 



code, as in the Amoeba. 

 Elasmobranchii. (Gr. e\a<r/j.a, a strap ; ppa-yx' 1 *, gill.) The sharks 



and rays. 



Elytra. (Gr. t\vrpoj>, a sheath.) Horny wing-covers of beetles. 

 Embryo. (Gr. eV, in; Ppvw, I swell.) The earliest period at which 



the young of animals is recognized. 

 Encysting". To become inclosed in a cyst or sac. 

 Entomostraca. (Gr. ej/ro^ua, insects ; tffTpoucov, a shell.) A division 



of Crustacea. 

 Epipodite. (Gr. tiri, upon ; ITOVS, foot.) An appendage of the basal 



joint of the limbs of Crustacea. 

 Equilateral. With equal sides. 



Equivalve. Referring to shells which have two equal valves. 

 Exopodite. (Gr. e|o>, outside ; iroGs, a foot.) The outer of the two 



secondary joints of the somite of a Crustacean. 

 Exserted. Protruded the opposite of inclosed. 

 Fauna. (Lat. fatmi, rural gods.) The native animals of a certain 



locality. 



Flagellum. A whip. The appendage of some Protozoa. 

 Foraminifera. (Lat. foramen^ a hole ; fero, I bear.) Rhizopods 



with perforated shells. 



Gallinacei. (Lat. gallina, a fowl.) An order of birds. 

 Ganoid (Gr. ydvos, splendor.) Applied to certain fish-scales. 

 Gasteropoda. (Gr. yajr-fip, the belly ; irovs, foot.) A class of Mol- 



lusca. 



Glaucus. Bluish-green or gray. 



Globigerina. (Lat. globus, a ball ; gero, I carry.) A group of Fora- 

 minifera. 



Grallatores. (Lat. grallce, stilts.) Wading-birds. 

 Gregarinidae. Lat. grex, a flock.) A class of Protozoans. 

 Halteres. (Gr. aA/r/jpes, poisers.) The rudimentary hind-wings of 



Diptera. 



Hemiptera. (Gr. v>jiti, half; vrepdv, wing.) An order of insects. 

 Heterocercal. The tail of fishes when the lobes are unequal, as the 



sharks. 

 Heterophagi. Birds whose young are born in a helpless state, as 



robins, etc. 



Heteropoda. An order of Mollusca. 

 Hexapodus. Six-footed. 

 Holometabolic. (Gr. OA.OS, whole ; /uerajSoMj, change.) Insects whose 



metamorphosis is complete. 



