USED IN NATURAL HISTORY. 



59 



ELEPHUS. Lat. Belonging or re 

 lating to an elephant. 



ELEVATING CAUSES. Igneous agency. 

 Terms applied by geologists to 

 those causes which refer to the 

 operation of volcanoes, earth- 

 quakes, and gradually elevating 

 forces. 



ELEVATOR. Applied to muscles 

 whose function is to raise certain 

 parts. 



ELLIP'SOID. Like an ellipsis. 



ELLIP'TIC-LANCEOLATE. A form be- 

 tween elliptical and lanceolate. 



ELOX'GATED. Lengthened ; drawn 

 out. 



ELOPS. Specific name of a fish. 



E'LTTRA. Lat. plur. of elytrum. 



E'LYTRUM. fr. gr. elutron, a sheath. 

 A wing-cover. The first pair of 

 wings, when hard and horny, as 

 in beetles. 



EMA'RGIJTATE. fr. lat. e, from ; mar- 

 go, margin or edge. Having a 

 notch. This term is opposite to 

 immarginate. Crystals are said to 

 be emarginated when each of the 

 edges of their primary forms is 

 truncated by one face. 



EMARGI'NULA. fr. lat. e, from ; mar- 

 go, marginis, border or margin. 

 A genus of gasteropods, charac- 

 terized by a shell of simple coni- 

 cal form, but having a narrow 

 fissure, extending from the mar- 

 gin to near the summit, (p. 61, 

 Book v). 



EMBERI'ZA. Generic name of the 

 buntings. 



EMBOSS. fr. fr. bosse, a protuber- 

 ance. To cover with lumps or 

 bunches. 



EMBOSSED. Projecting in the cen- 

 tre, like the boss or umbo of a 

 round shield or target. 



EMB RACING. Amplexicaule ; clasp- 

 ing. 



EM'BRTO. fr. gr. embruon, from 

 bruo, I bud forth. A germ at the 

 early stages of development. 



EMBRTO'TEGA. fr. gr. embruon, em- 

 bryo; tegos, a covering. A small 



callosity found in some seeds, not 

 far from the hilum ; at the timt 

 of germination it opens like a lid 

 for the emission of the radicle of 

 the embryo. 



E'MERALD. A mineral of a beauti- 

 ful green colour, much valued for 

 ornamental jewelry. It consists 

 of silica, alumina, glucina, oxide 

 of chromium, which is the colour- 

 ing matter, and a trace of lime. 



EMER'SED. Raised above water. 



EMT'DIAJTS. A family of reptiles 

 of the order of chelonia. 



E'MYS. fr. gr. emus, a water tortoise. 

 A genus of reptiles of the family 

 of emydians. 



EXA'MEL. The substance which co- 

 vers the crowns of the teeth. It 

 is of a white colour, very smooth, 

 and polished, and sufficiently hard 

 to strike fire with steel. Enamel 

 is thickest where the teeth are in 

 contact, and thinnest about the 

 neck of the tooth. The fibres of 

 the enamel are perpendicular to 

 the surface of the teeth, on which 

 they seem, as it were, planted. 

 This gives them a velvety appear- 

 ance when examined by the mi 

 croscope. The enamel has no 

 blood-vessels, and is not renewed 

 when removed. 



EJ*CEPH'ALOX. fr. gr. en, in ; kephale^ 

 head. The contents of the cra- 

 nium : the brain and spinal mar- 

 row are at times included in this 

 term. 



ENCRASICHO'LUS. Specific name of 

 the anchovy. 



ENCRI'XITES. fr. gr. krinon, a \i\y. 

 A genus of echi'noderms. (p. 52, 

 Book viii). 



ENDO. fr. gr. endon, in, within. A 

 prefix. 



EN'DOCARP. fr. gr. endon, within; 

 karpos, fruit. An internal mem- 

 brane of fruits. 



EN 'DOGEWS. "> fr. gr. endon, in ; g. 



EsrDo'cEifous. 5 nomai, to be pro- 

 duced. A plant which increases 

 in diameter by deposition in the 



