414 INDEX AND GLOSSARY. 



Duchenne's trocar, 234. 



Dytiscus, 177 (Gr. dytiskos, di\ 7 ing). 



Ear, 222. 



Earths, analysis of, 99. 



Echinococcus, 171, 333 (Gr. echinos, a hedgehog; kokkus, 

 a berry). Larval forms (scolices) of tapeworms, known as 

 " hydatids." 



Echinodermata, 167 (Gr. echinos, and derma, skin). Spiny- 

 skinned animals. 



Ectosarc, 158 (Gr. ektos, outside; sarx, flesh). 



Eczema, 256. A vesicular eruption on the skin. 



Eggs of Insects, 175. These are interesting microscopic ob- 

 jects from the variety of their forms, colors, and markings, and 

 the singular lids of many of them. The markings are analo- 

 gous to other unicellular organisms, as spores, pollen grains, 

 Desmids, and Diatoms. 



Elastic fibres, 194. 



Elaters, 154 (Gr. elater, an impeller), In the Equisetaceas, 

 elaters are four elastic filaments attached to the spore, which, 

 by their uncoiling, jerk the spore away from its position. They 

 seem to be formed by spiral fissures in the outer coat of the 

 spore. In liverworts (Hepaticese) they are elastic fibres coiled 

 in membranous tubes, and originate as spiral fibres of vessels. 

 They are supposed to assist in the dispersion of spores. 



Elytra, 175 (Gr. elution, a sheath). 



Electrical cement, 76. 



Elephantiasis, 270. A species of leprosj^ or skin disease. 



Embryology, 204 (Gr. en, in ; bruo, I swell). 



Embolism, 272. Result of occluding clots in bloodvessels. 



Embryonic cells, 263. 



Enchondroma, 278. Cartilaginous tumor. 



Encephalon, development of, 203 (Gr. egcephalos, brain). 



Encephaloid cancer, 292. 



Endochrome, 152. Used for cell-contents of Algre. 



Endogenous stems, 156 (Gr. endon, within ; ge/nnao, I bring 

 forth). 



Endosmose, 129 (Gr. endon; otheo, I push). The current 

 flowing inwards when diffusion of fluids occurs through a 

 membrane. 



