END 



[ 156] 



E 



from the ammonite, in which it is 

 dorsal, and from the nautilus, in 

 which it is central. 



ENDOSKE'LETAL. Having its skeleton 

 within. 



E'NNEAGON. (from eWea, nine, and 

 ryuWa, angle, Gr.) A polygon with 

 nine faces. 



ENNEAPE'TALOTTS. (from eWeo, nine, 

 and TTGTaAoi/, a petal, Gr.) In bo- 

 tany, a corolla having nine petals. 



E'NSIFORM. (ensiformis, Lat.) Sword- 

 shaped; two-edged; tapering to- 

 wards the point like a sabre. In 

 botany, applied to two-edged leaves, 

 slightly convex on both surfaces, 

 and gradually tapering to a point 

 from the base to the apex. 



ENTI'RE. (entier, Fr. inUro, It.) 

 Whole ; undivided ; complete in all 

 its parts. In botany, a term 

 applied to leaves when the margins 

 are devoid of notches, serrations, or 

 incisions. In conchology, when a 

 shell is whole and undivided, 

 neither interrupted nor intermar- 

 ginated, it is termed entire. 



ENTOMO'IDA. The third sub-kingdom 

 of the animal kingdom, called also 

 Diplo-gangliata. " This sub-king- 

 dom," says Prof. Grant, " is chiefly 

 composed of articulated animals 

 with articulated members, the 

 insects of Linnaeus, which have an 

 elongated, segmented form of the 

 trunk, with tubular jointed organs 

 of motion symmetrically disposed 

 along its sides. Their exterior 

 covering is more consolidated, and 

 generally contains phosphate of 

 lime. Some respire by branchiae, 

 others by ramified tracheae, and 

 others by pulmonary sacs. Most 

 are active, carnivorous, and pre- 

 daceous." This sub-kingdom com- 

 prises the following classes, namely, 

 Myriapoda, Insecta, Arachnida, 

 and Crustacea. 



ENTO'MOLITE. (from eWoytta, an insect, 

 ans A/tfos, a stone, Gr.) A fossil 



insect; a petrified insect. These 

 are found either in amber or in 

 fossil stones. 



ENTOMOLI'THUS PARADO'XUS. The name 

 given, erroneously, at one time to 

 fossil trilobites. Fossil trilobites 

 were long confounded with insects, 

 under the name of entomolithus 

 paradoxus ; after many disputes, 

 their place is now established in a 

 separate section of the class Crus- 

 tacea. 



ENTOMO'LOGY. (from eWo/*,a, and 

 Aoryos, Gr.) That part of the 

 science of zoology which treats 

 exclusively of insects, of their his- 

 tory and 'habits; that branch of 

 natural history which treats of in- 

 sects. The object of entomology is, 

 to investigate the nature of insects ; 

 its design is to show how the in- 

 sect is organised and formed, and 

 why it was obliged to adopt this 

 particular conformation and inter- 

 nal structure; and, when this is 

 accomplished, it proceeds to the 

 generalisation and development of 

 the various vital phenomena ob- 

 servable in the class. Its view, 

 however, is not limited to show 

 the mere general form of the body 

 of the insect, but it also displays 

 how this general form varies in the 

 several orders of insects, and how 

 far this general transformation and 

 change may extend, without de- 

 struction to its identification. 



ENTOMOSTO'MATA. In the concho- 

 logical system of De Blainville, the 

 entomostomata form the second 

 family of Siphobranchiata, and 

 include many genera, as the buc- 

 cinum, dolium, cerithium, eburna, 

 and other univalves. 



ENTOMO'STRACON. i (from 

 ENTOHO'STRACA PL. j an insect, 

 and oaTpaicov, a shell, Gr.) Shelled 

 insects. In Cuvier's arrangement 

 the entomostraca form the second 

 section of Crustacea. Entomos- 



