784 



EPIPHEAGM. The membranaceous or calca- 

 reous substance by which some species of 

 molluscs close to the aperture of the shell 

 when they retire within to hibernate. 



EPIPLOON. The fatty membrane which 

 covers or occupies the interspaces of the 

 entrails in the abdomen. 



EPISTOMA. The space between the antennas 

 and oral cavity in Crustacea. 



EPISTERNAL. Pertaining to that part of an 

 articulate animal which is immediately 

 above the sternum. 



EPITHELIUM. The thin epidermal mem- 

 brane which covers the mucous mem- 

 branes. 



EPIZOA. The class of imp_erfectly organized 

 parasitic crustaceans which live upon other 

 animals. 



EPIZOOTIC. In geology, an epithet given to 

 such mountains as contain animal remains 

 in their natural or in a petrified state, or 

 the impressions of animal substances. 

 Also, an epithet for a disease which prevails 

 among cattle, in the same manner as an 

 epidemic does among men. 



EQUATE. Without larger partial elevations 

 or depressions. 



EQUICKUEAL. Having legs of equal length. 



EQUILATERAL. Having all sides alike : ap- 

 plied to bivalve shells, when a line drawn 

 perpendicularly from the apex would di- 

 vide the shell into two equal parts. 



EQUILIBRITY-. The state of being equally 

 balanced ; equilibrium. 



EQUINE. Pertaining to a horse or to the 

 genus. 



EQUIPENDENT. Hanging in equipoise. 



EQUIVALVE. Having both valves of equal 

 dimensions. 



EQUIVOEOUS. Feeding or subsisting on horse- 

 flesh. 



ERECT. Nearly perpendicular. 



ERECTILE. A term applied to a tissue pecu- 

 liar to some parts of the animal body ; 

 and which is formed of veins, arteries, and 

 nervous filaments. 



ERECTO-PATENT. When the primary wings 

 of an insect at rest are erect and the se- 

 condary horizontal. 



EROSE. Irregularly notched, as if gnawed. 



ERUBESCENCE. Redness of the skin or sur- 

 face of any thing. 



ERUGINOUS or ^ERUGINOUS. Green with a 

 blue tint : the colour of the rust of copper, 

 verdigris. 



ESCARGATOIRE. A nursery of snails. 



ESCHAROTIC. Having the power of searing 

 or destroying the flesh. 



ESCULENT. Eatable, or that may safely be 

 used by man as food. 



ESTIVAL. Pertaining to summer, or con- 

 tinuing during the summer. 



ETHMOIDAL. Pertaining to a bone at the 

 top of the root of the nose, called the eth- 

 moid. 



EUPEPTIC. 



EVISCERATED. 



EXARTICULATION. The dislocation of 



EXCAVATE. A depression the arc of which 



is not the segment of a circle. 

 EXSCINDED. When the end has an angular 



notch taken out. 



Having good digestion, 

 so. Deprived of the intestines. 



EXCISION. A cutting out or cutting off any j 

 part of the body. 



EXCORIATED. Abraded ; the skin or cuticle > 

 rubbed or worn oif. 



EXCREMENTITIOUS. Consisting of matter 

 evacuated, or proper to be evacuated, from 

 the animal body. 



EXCRESCENCE. Any tumour, wart, or pre- 

 ternatural enlargement or superfluous 

 part. 



EXCRETORY : EXCRETIVE. Having the 

 quality of excreting or throwing off excre- ; 

 mentitious matter by the glands. 



EXCURVKD. When curved outwards. 



EXFOLIATED. Separated in thin scales, as a 

 carious bone. 



EXOSSEOUS. Without bones ; destitute of j 

 bones. 



EXOTIC. Produced in a foreign country. 



EXPALPATE. When an imperfect mouth 

 has no palpi. 



EXPANDED. When wings at rest are hori- 

 zontally extended and do not cover each 

 other. 



EXPLANATE. When the sides of the pro- 

 thorax are so depressed and dilated as to 

 form a broad margin. 



EXSANGUIOUS. Destitute of red blood. 



EXSCUTELLATE. When an insect has no vi- 

 sible scutellum, it being wholly covered by 

 the prothorax. 



EXSERTED. When the head of an insect 

 is quite disengaged from the trunk. 



EXTENDED. When wings at rest do not lie 

 upon the body. 



EXTENSOR (muscle). A muscle which serves 

 to extend or straighten any part of the 

 body, as an arm or finger : it is opposed to , 

 flexor. 



EXTINCT. Having ceased to exist, and, 

 when discovered, only found in a fossil 

 state. 



EXTRAOCULAR. Applied to the antennae 

 when they are inserted on the outsides of , 

 the eyes. 



EXTRAGENEOUS. Belonging to another 

 kind. 



EXTRATASATED. Forced or let out of its 

 proper vessels ; as, extravasatcd blood. 



EXUVIAE. Cast skins, shells, or coverings of 

 animals, or any parts which are shed or 

 cast off. Also, the remains of animals 

 which at some period, long*antecedent, 

 were deposited in the earth. 



EXUVIAL. Pertaining to the spoils or re- 

 mains of animals found in the earth, sup- 

 posed to be deposited there at the Deluge, 

 or some great convulsion which the terra- 

 queous globe has undergone. 



FACET. A small surface : applied to the 

 composite eyes of insects. 



FACIAL. Pertaining to the face ; as the fa- 

 cial artery, nerve, &c. 



FAECES. Excrement. 



FALCATE. FALCATED. Bent or hooked like 

 a scythe ; curved with the apex acute. 



FALCIFORM. Long and curved, in the shape 

 of a sickle : a word applied to the mandi- 

 bles of insects. 



FALSE LEGS (of insects). Certain prehensile 

 appendages on the lower segments of the 

 body of the larvae. 



