448 
INDEX. 
List of siibscvibers 436-9. 
Lis’er (see Digestive gland). 
Locomotion 313, 316, 317, 318, 340,347, 
rates of 34S. 
Longitudinal aperture 32. 
Lower margin of bivalves 30. 
Lophophoral line, Anodonta 301. 
Love-dart 366, Helix nspcrsn 163, II. 
hnvtensis'i&i, H. Ir/picida 368, H. po- 
vintia 369, H. 2^>dclH'l/n 368, II. 
virrjatn 368, diagrammatic sections 
of Helix a.'ipcrsn, H. hi-yiidn, H. itala 
and H. pi.'iana 367, in sitft Helix as- 
persa 160, Zonituidcs cxcavatn 363, 
370. 
Lunate aperture 33. 
Lung, Helix aspcrsn 8, Limax flavus 
304, blood sinus in lung of Helix 
jmmatia 305. 
Lunule 44. 
Lvmi)liatic gland 330, Anodonta ISO, 
'Helix 158. 
Macromeres 380. 
Malacology 3. 
Malleate, seuli)tnre 28, 71, cause of 71, 
Limna’n pcregm 71. 
^lammalian enemies 4IO. 
Mandibles, 248, 24IK Bithynia tcntacn- 
lata, 252, Cyelostoma clegans 249, 
251, development 240, muscles of 
249, Helix a.ytcr.vt 152, H. pulchella 
253, 254, H. pygniwu 250, Lijna.v 
inaxiniK.^ 253, Liinna-a peeegra 252, 
Pupa rylindracca 255. 
Mantle 145. 
Margin, anterior or cephalic 37, dor- 
sal, lower, posterior, siplional, upper 
and ventral 36. 
Marginate aperture 35, 69, causes 60, 
Planorbifs spirorhis 60. 
ISI.arginal, teetli 261, area ."FCd. 
Marine intluence, ell'ect of 85. 
Markings of bivalves 50, 51. 
Measurement of bivalves 54, uni- 
\-alves 35. 
Median, area 60, gut ^5, teeth 261. 
Medicinal uses 437. 
Mediterranean, subregion 400, pi. v. 
Melanin 329. 
Melanism 94, pi- ii-, f. 2. 
Mel.anochroi.sm 93, pi. ii., f. 3. 
Melanoids 88. 
Meroblastic segmentation 380. 
Mesocerebron 217. 
Mesocones 152, 261. 
Mesoderm 381. 
Mesopodiuni 103. 
Mesozoic strata 400. 
Met.acerebron 217. 
Metapodium 193. 
Meteorological inlluences, effects on 
shell 83. 
Micromeres 380. 
Micropyle 377. 
Migration, routes of 392, pi. iii. 
Mitosis 378. 
Modiolaria discors, section of byssal 
furrow 321. 
Mollusca, as food 434'< fts medicine 437, 
as ornaments 48I, as objects of 
superstition 242, 432. 
Monaster 379. 
Mongolian subregion 400, pi. v. 
Monochromic colouring 86, pi. ii., 
f. 12, 13. 
Mono^cia 141, 354, cryptophallia 355, 
ditreniata 355, exophalha 354, 355. 
Monognatha 250, 253, origin 253. 
Monomya 10, IG4, 346. 
Monorhiza 343, 344. 
Monotocardia 291. 
jMonotocardiate gastropod, ctenidium 
of 302. 
Monotremata 356, gynogama357, hap- 
logama 356, stylogama 357. 
Monstrosities 103, causes of I04, 
chemical refuse 106, Hydra viridis 
107, interference by Drcissensia 107, 
leeches 107, nomenclature 17, frit- 
water 104, polluted waters I04, 
.saline waters 104, stagnant waters 
107, water-current 106. 
Morula stage of segmentation 380. 
Motor, ganglia 213, nerves 212. 
IMouth 138, 152, 170, 185, 190. 
Mucous, cells 157, filaments 316, 317, 
glands of Helix aspersa 162, H. 
fiisea, H. iteda, H. poniatia 370, H. 
rnfescens 364, 370, and Hyalinia 
aliiaria 364, tracks 313, 315, 316, 
use of 576, 317, 318. 
Multifid vesicles (see Mucous glands). 
Multipolar ganglion cells 210. 
Multisfural, univalves 26, operculum 
126. 
Muricate sculpture 27. 
Muscular scars 54, Anodonta cygnea 
55, 180, bivalves 54, Drcissensia 10, 
Helix pomatia 54. 
Muscular system I40, 34O, Anodonta 
181, 346, 347, Drcissensia 347, Helix 
158, somatic I4I, splanchnic I4I. 
Muscle, pseudo-striate 141, unstriated 
140. 
“Music” of snails 242. 
Mutation 60. 
Muzzle 186,reti-actorsof Cyclostoma25Q 
Myoh.'cmatin 307. 
Myriogiossa 271, formula .^77. 
Mytilus edulis, attaching byssus 321. 
Nearctic region 399, pi. v. 
Necklace of Helix nenioralis 431. 
Neotropical region 398, pi. v. 
Nepbropneusta 8. 
Nephridial gland 34O, 
