608 INDEX 
Melanoides, 
XXII, figs. 17-18. 
bayont, Parreysia ruellant var., 385. 
Unio ruellani var., 385. 
becearii, Bulinus, 140. 
Physa, 140. 
beckit, Neritena, 158. 
bella, Anceya, 75, 228, 235, 238 (Figs. 
36-37), 239, 589. 
Bellamya, 203, 205. 
bellamya, Bellamya, 203, 205. 
bellamyi, Aspatharia, 420. 
Nodularia, 379. 
Pharaonia, 379, 399. 
Spatha, 420. 
Vivipara unicolor var., 205. 
bellula, Trochozonites, 492. 
bengalensis, Planorbis, 128. 
bengoénsis, Egeria, 360. 
Galatea, 360, 361. 
Galateia, 360. 
benguelensis, Bulinus, 135. 
Physa, 135. 
— Planorbis, 128. 
benguellensis, Limnexa, 108. 
bequaerti, Cerastus, 513. 
Cleopatra, 291, 296, 569. 
Eupera, 355, 358, 4538, 569. 
Homorus, 509. 
Ptychotrema, 499. 
Streptostele, 513. 
Subulina, 509. 
Succinea, 578. 
Zingis, 519. 
bequaertiana, Varicostele, 511. 
bernardiana, Ampullaria, 186. 
bernardianus, Lanistes, 186, 188. 
bernardii, Egeria, 361, 362, 369. 
Galatea, 361, 362. 
Galateia, 361. 
_ Galathea, 361. 
Bersama, 509. 
bertilloniana, Spatha, 421. 
bialata, Hyriopsis, 409. 
biangulata, Egeria, 361. 
Galatea, 361. 
Paludina, 206. 
biangulatus, Viviparus unicolor mut., 206. 
254, 264, 568. Pi. 
biarmicus, Panurus, 474. 
bicarinata, Cleopatra bulimoides var., 291. 
Viviparus unicolor var., 207. 
bicarinatum, Neothauma, 211. 
Neothauma tanganyicense var., 
210, 211, 588) Fl, X1X, fie. 4. 
bicarinatus, Lanistes, 186, 193, 194, 560, 
568. PL XVIM, fig. 1. 
Lanistes carinatus var., 186. 
Planorbis, 120. 
bicolor, Homorus, 509. 
Ostrea, 563. 
bifasciata, Assiminea, 242. 
Syncera, 242. 
bifasciella, Calobea, 533. 
Bilharzia, 91, 96. 
bilirata, Cleopatra bulimoides var., 291. 
billottianus, Unio, 379. 
Biomphalaria, 115, 120. 
bistriplicina, Gulella, 492. 
Bithinia, 214. 
bithydea, Corbicula, 345. 
Biihynia, 96, 213, 214, 215, 216, 217, 
218, 219, 220, 299, 534, 580. 
Bithynis, 27, 37, 40, 66. 
Blanfordia, 94, 95, 96. 
Blauneria, 103. 
bloyeti, Lanistes, 194. 
Meladomus, 194. 
Physopsis, 143. 
Plotia, 254. 
Spathella, 423. 
Bloyetia, 484. 
bocageana, Limnexa, 108. 
bocaget, Limnea africana var., 108. 
Bocageia, 483, 510, 511, 513. 
bocagil, Egeria bengoensis, 360. 
Galateia, 360, 361. 
boceardi, Planorbula, 131. 
Spheerium, 347. 
boéhmi, Celatura, 379, 407, 587. 
Rachis, 496. 
Unio, 407. 
boettgeri, Lanistes, 194. 
Meladomus libycus var., 194. 
bohmi, Nodularia, 407. 
boissyi, Planorbis, 93, 95, 117. 
boivini, Pseudoglessula, 499, 500, 517: 
