INDEX TO VOLUME LIII 
New names of genera, sections, species, subspecies, and mutations are printed in heavy-faced 
type, also the main reference in a series of references; 
abbadiana, Soleilletia, 345, 346. 
abbreviata, Mutela complanata mut., 429. 
Mutelina complanata mut., 429. 
Abida, 485. 
abyssinica, Hagenia, 509. 
Physa, 148. 
Physopsis, 143. 
Vivipara, 204. 
abyssinicensis, Planorbis, 124. 
abyssinicum, Spherium, 347. 
abyssinicus, Allophylus, 509. 
Ancylus, 155. 
Planorbis, 124. 
Pseudancylus, 155. 
Unio, 378. 3 
Viviparus, 204. 
Acacia, 495, 502. 
Acanthacez, 509. 
acanthurus, Bithynis, 27. 
Palemon, 27. 
Acarina, 472. 
Acavide, 484, 486, 600, 601. 
Achatina, 464, 469, 472, 474, 479, 490, 
491, 493, 494, 496, 499, 500, 506, 
509, 512, 513, 518, 519, 602. 
achatina, Paludina, 203. : 
Achatinide, 468, 482, 484, 485, 486, 490, 
491, 599, 600. 
Achatinine, 464, 490, 506, 507. 
acinoides, Melampus, 99. 
Acostza, 447. 
Acrostoma, 273. 
acroxa, Limnexa, 118. 
Actophilus, 539. 
aculeata, Nerita, 246. 
acuminata, Alexia, 104. 
Lymnea, 106. 
Nodularia, 393. 
Nyassela, 255. 
Parreysia, 378, 392, 3938, 576. PI. 
XXXI, fig. 18. 
Phytia, 104. 
acuminatus, Unio, 393. 
acuta, Auriculastra, 104. 
603 
synonyms are printed in ttalics. 
Dafila, 539. 
Helix, 221. 
Physa, 147, 522. 
Physa fontinalis, 89. 
acutalis, Nyassia, 255. 
adansoni, Aspatharia, 419, 420. 
Lanistes, 194, 196, 545, 561, 568, 
Pl. XVII, figs. 5-7. 
Lanistes ovum var., 196. 
Mutela, 430. 
Spatha, 419, 420. 
adansoni, Bulinus, 138. 
Excalfactoria, 476. 
Pedtipes, 108. 
Planorbis, 124, 125. 
adansoniz, Trochozonites, 492. 
adansomana, Nerita, 161. 
Neritina, 158, 159, 161, 164, 565, 
568. Pl. XIII, figs. 1-15. 
adelus, Nothapalus, 601. 
adherens, Protancylus, 132. 
admirabilis, Anceya, 228, 236 (Fig. 33a), 
237 (Figs. 34b and 35a-c), 238, 
239, 589. 
Cameronia, 440. 
Melania, 264. 
Melanoides, 252, 262, 264, 587, 588. 
adnivalis, Senecio, 511. 
adowensis, Planorbis, 116, 118 (Fig. 4), 
119, 120, 556, 568, 572, 576, 587, 
597. 
adspersa, Bithynia sennariensis var., 216. 
adspersus, Bulimus senaariensis var., 216. 
adusta, Ampullaria, 176. 
Aédonopsis, 478. 
zgyptiaca, Ampullaria, 186. 
Celatura, 378, 400, 402, 406 (Fig. 
89), 568, 576. 
Corbicula, 341, 345. 
Corbicula subtruncata var., 340. 
Galatea, 361. 
Limneza, 108. 
Melania, 291. 
Mutela, 428, 433. 
