444 
INDEX. 
Eastern province, British Isles 4Wj’,phvi. 
Echinate sculpture 27. 
Eclhnoglossa 268, formula J60. 
Ectocones loJ, 2(31. 
Efferent, nerves 212, 316, pulmonary 
veins 156. 
Egersidia 364- 
Egg, capsule 377, cleavage grooves 
378, expulsion of polar bodies 378. 
Elasmognatlia 254, -56. 
Elongate univalve 24, 30, causes of 62. 
Embryo, rotation of 382, shell sculp- 
ture of 72, cause of 72. 
Endocones 152, 261. 
Endoderm 3S0. 
Endogastric coiling 109. 
Enemies 41(^> batrachians 4iS, birds 
417, fish 41^1 insects 476, malaco- 
vorous gastropods 42(1, mammalia^iS 
Enterochloro]>hylls 307. 
Entergogenesis 60. 
Enterolnematin 307. 
Eocene, fo.s.sils 410, 4II1 strata 4I6. 
Epiconch 21, chemical structure of 21, 
duplex 22, function 22. 
Epidermis 21. 
Eiddidymic co'cum 359. 
Ei)iphragm, cliemica.l structure 131, 
formation of 129, function 130, Helix 
ncmoralis 129, Helix ponmtia 130, 
7Yrt»or6w7Ji,snmmer 129, winter 13(). 
Epiphallus .361. 
EpiphallogonaJOo, distribution pi. iv., 
sexual organs 395. 
Epipodium 193. 
Epithelial cells224,of Helix ponmtici 135 
E([uilateral bivalves 40. 
Equilibrating organs 133, 151. 
Equivalve bivalves 9, 36, 39. 
Erytlirism 94, ph ii. , f. 9. 
Erythrochroism 94, pi. ii., f. 7. 
Escutcheon 44. 
H/n.ffi/lis coarctrifa 423. 
Escargotieres 425. 
Ethiopian region 399, j)!. v. 
Eulamellibranchiata 302. 
Euroi)ean subregion 490, jil. v. 
Eurydontophora 269. 
Eurydontate teetli 269. 
Euthyneura 6, buccal musculature .247, 
2.59, derivation of 203, nepliridium 
335, nervous system 214, organiza- 
tion 143, otocysts 249, pulmonata 8, 
teeth chassilication 266. 
Exercise, inlluence on pulsation 297. 
Exogastric coiling 109. 
Exoi)hallia, dicccia 352, moiuecia 354, 
355. 
Exorcism against snails 424. 
Expanded lip 66. 
External, ligament 48, surface of bi- 
valves 49, shell 20. 
Extrinsic buccal muscles 153, 258, 259, 
of Helix 158, 159. 
Eyes, cephalic, 133, 230, Anodonta 
eygnea 171, dorsal 233, 234, evolu- 
tion of 232, Helix pomatia\5(i, pallial 
234, strueture 231. 
Facial groo^■es I45, 186. 
Falcate bivalves 53. 
Fasciola hepatica 422. 
heeding track. Helix aspersa 260. 
Ferment of digestive gland 230. 
Fertilizing vesicle 375. 
Filibranchia 302. 
Flagellum 358, 361, of Helix 160, 161. 
Flammular markings 101. 
Fleche tricuspide 172, of Donax 278. 
Flemming’s cells 223. 
Flowing water, effects on colour 37. 
Food 285, influence on colour 91, 329, 
of pelecypods 285. 
Foot, cleft 194, fringe 192, trifascia- 
tion of 194, reptary 195, subreptatory 
195, vestigial 195. 
Foregut 245. 
Forms of bivalves 51, compressed 52, 
cordate 53, falcate 53, oblong 51, 
oval 51 , reniform 52, rounded 51, sub- 
rhomboidal 52, transverse 51, trape- 
zoidal 52, triangular 52, truncate 53, 
tumid 53. 
Formula for hinge-teeth 46, Jfl. 
Formulre for pentatreniate banding 
96, 97, 98, 99. 
Fossils 494i carboniferous 4O6, dev- 
onian 405, eocene 410, 4II1 liassic 
407, oolitic 498, oligocene 412, 413, 
pliocene 414, post-tertiary 415, weal- 
den 499. 
Fusiform univalve 24. 
Ganglion cells 138, 209, 210, structure 
1.37, 138, axis cylinder of 210. 
Gaping bivalves 42. 
Gastropoda 5, locomotion of 34S, mus- 
cular .scars 54, nervous .system 213, 
organization 143, ureter 335, 336. 
Gastrula stage of development 380, 381. 
Generic names, formation of 15. 
Genetic table 11. 
Genital glands (see Gonads). 
Geograpliical, distribution 385, regions 
397, pi. V., variety 59. 
Geological, history 403, literature 435. 
Gibbous univalve 25, 65, causes of 64. 
Gills 597, cavities of 177, structure 177. 
Gizzards 246, 275. 
Gland 313, albumen 160. 161, 359, of 
auricle 339, byssal 320, calcic 323, 
caudal 192, 197, 314, 319, concretion- 
ary 338, coronal 370, digestive 138, 
140, 245, 279, digitate 162, hypo- 
branchial 198, 314, 319, lymphatic 
339, mucous 162, 364, .37(), nephri- 
dial 540, pericardial 74f^j 337, salivary 
