GLOSSARY. 63 1 



Eo'cT-sts (Gr. ehdusia, a stripping off). A shedding or moulting of the skin. 



E-OHi-KO-000'oi (Gr. echmos, a hedgehog ; koklx)s, a berry). The larval forms 

 (scolioes) of the' tapeworm of the dog {Tasnia eoh,nococeua), commonly 

 known as " hydatids." 



E-chi-no-dek'ma-ta (Gr. echinos ; and derma, skin). A class of animals com- 

 prising the Sea-urchins, Star-fishes, and others, most of which have spiny 

 skins. 



E-ohi-noi'de-a (Gr. echinos ; and eidos, form). An order of McMnodermata, 

 comprising the Sea-urchins. 



E-ohin'u-late. Possessing spines. 



Ec'to-ctst (Gr. eUos, outside ; &ustis, a bladder). The external investment 

 of the ccencecium of a Polyzoon. 



Eo'to-ijebm (Gr. ektos ; and derma, skin). The external integumentary layer 

 of the Codenterata. 



Eo'to-saeo (Gr. ehtos ; sarx, flesh). The outer transparent saroode-layer of 

 certain Shimpods, such as the Arrtoiba. 



E-den-ta'ta (Lat. «, without ; dens, tooth). An order of Mam/matm often 

 called Bruta. 



E-ben'to-lous. Toothless ; without any dental apparatus. Applied to the 

 mouth of any animal, or to the hinge of the bivalve Molluscs. 



E-dei-oph-thal'ma-ta (Gr. hedraioa, sittiijg ; ophthahnos, eye). The division of 

 Crustacea in which tbe eyes are sessile, and are not supported upon 

 stalks. 



E-las-mo-beai.-oh'i-i (Gr. elasma, a plate; bragcTiia, gills). An order of 

 Fishes, including the Sharks and Bays. 



El't-tea (Gr. elmtron, a sheath). The chitinous anterior pair of wings in 

 Beetles, which form cases for the posterior membranous wings. Also ap- 

 plied to the scales or plates on the back of the Sea-mouse {Aphrodite). 



Em'bey-o (Gr. en, in; Tyruo, I swell). The earliest stage at which the young 

 animal is recognizable in the impregnated ovum. 



Ek-oeph'a-lon (Gr. egkmhalos, brain). The portion of the cerebro-spinal 

 nervous axis contained within the cranium. 



En-oeph'a-lotis (Gr. en, in; hephale, the head). Possessing a distinct head. 

 Usually applied to all the MoUusca proper, except the iMmelUbrcmchiata. 



En-ots-ta'tion (Gr. en, in; huatU, a bag). The transformation undergone by 

 certain of the Protozoa, when they become motionless, and surround them- 

 selves by a thick coating or cyst. 



Eh'de-kon (Gr. en, in; deros, skin). The inner _plane of growth of the outer 

 integumentary layer (viz., the ectoderm, or epideimis). 



En'do-otst (Gr. endon, within ; hustis, a bag). The inner membrane or in- 

 tegumentary layer of a Polyzoon. In Crietatella, where there is no " ecto- 

 oyst," the endooyst constitutes the entire integument. 



En Do-nEEM (Gr. endon/ and derma, skin). The inner integumentary layer 

 of the Ocelenterata. 



En-dop'o-dite (Gr. endon ; and pous, foot). The inner of the two secondary 

 joints into which the typical lunb of a Omstacean Is divided. 



En'do-saeo (Gr. endon ; and sarx, flesh). The inner molecular layer of sarcode 

 in the Ammba and other allied BMzopods. 



En-do -sKEL'EKroN (Gr. endon; and sMetos, dry). The internal hard struc- 

 tures, such as bones, which serve for the attachment of muscles, or the pro- 

 tection of organs, and which are not a mere hardening of the integmnent. 



Eh'si-eoem (Lat. ensis, a sword; forma, shape). Sword-shaped. 



En-to-moph A-GA (Gr. entoma, insects ; pJmgo, I eat). A section of the Mar- 



Ek-to-mos'tea-ka (Gr. entoma, insects ; ostrakon, a shell). Literally, shelled 



insects— applied to a division of Crustacea. _ _ _ 



En-^o-zo'a (Gr. entos, within ; zoiin, animal). Ammals which are parasitic m 



the interior of other animals. , ,. . . -^-u 



E'o-CEMB (Gr. «o«, dawn ; hainos, new or recent). The lowest division of the 



Tertiary rocks, in which species of existing sheUs are to a small extent 



represented. 



