INDEX 
Cleopatra bulimoides var., 295. 
Lanistes, 74, 168 (Fig. 13e), 183, 
185 (Fig. 16a), 187, 189, 190, 
191, 198, 201, 527, 541, 556, 568. 
Pl. XVIII, figs. 6-10. 
Lanistes labycus, var., 190. 
Ledoulxia mesogea var., 493. 
Meladomus, 190. 
Melania, 260. 
Melanoides, 75, 254, 260, 261, 568. 
Pl. XXII, figs. 7-8. 
Nudibranchiata, 97. 
Numida, 476. 
nux, Ampullaria, 169. 
Egeria, 75, 362, 367 (Fig. 82), 368, 
562, 569. Pl. XXIX, figs. 4-7. 
Pila, 167. 
nyangensis, Parreysia, 384. 
nyangweense, Ptychotrema, 503. 
nyangweensis, Melania, 265. 
Melanoides, 254, 265, 568. Pl. 
XXII, fig. 23. 
Pyrgophysa, 141, 142. 
nyanse, Limnexa, 110. 
Lymnea, 110. 
nyanzxe, Ampullaria, 176. 
Pila, 176. 
Spherium, 347, 348, 350, 576. 
nyassx, Unio, 384. 
nyassaénsis, Aspatharia, 422. 
Parreysia, 384. 
Spatha, 422. 
Unio, 379, 382, 384, 394. 
Nyassana, 183, 187. 
nyassana, Amnicola, 216. 
Corbicula, 342. 
Melania, 255, 256. 
Spathella, 422. 
nyassanus, Bulimus, 216, 217. 
Bulinus, 136. 
Lanistes, 183, 187. 
Physa, 136. 
Unio, 384. 
Nyassella, 251, 254, 255, 256. 
nyassensis, Unio, 384. 
Nyassia, 251, 254, 255, 256, 265. 
Nyassomelania, 251, 254, 255, 256. 
nyikaénsis, Achatina, 519. 
oahuénsis, Lymnea, 89, 95. 
obesa, Cafferia caffra, 380. 
Vivipara unicolor var., 206. 
obesus, Viviparus unicolor var., 206. 
obliqua, Burnupia, 151. 
Edgaria lechaptoisi var., 330, 590. 
Nodularia parreyssi var., 385. 
obliquus, Ancylus, 152. 
Ancylus, 151. 
Prisodon, 409. 
oblonga, Auricula kisterz var., 100. 
Auriculastra, 104. 
Lemodonta, 104. 
oblongus, Melampus kiisteri var., 100. 
obovatus, Melampus, 101, 102. 
obseura, Achatina, 519. 
Auricula umlaasiana var., 101. 
obscurus, Melampus umlaasianus var., 
101. 
obtusa, Cameronia, 442. 
Edgaria, 335. 
Edgaria egregia f., 335. 
Mutelina egyptiaca var., 428. 
Paramelania, 335. 
obtusata, Littorina, 564. 
Pseudoglessula, 513. 
occidentalis, Ampullaria, 176. 
Centropus monachus, 477. 
Pila, 176. 
Planorbis bridowat var., 117. 
Planorbis bridouxianus var., 117. 
occipitalis, Rana, 473. 
ochropus, Tringa, 538. 
octona, Subulina, 460. 
oculeus, Canirallus, 538. 
olens, Staphylinus, 470. 
oleosa, Vitrina, 511. 
olfersiz, Bithynis, 40. 
Macrobrachium, 7, 8, 40. 
Palzmon, 40. 
Oligochseta, 575, 585. 
oliphantensis, Corbicula, 340. 
oliavacea, Ampullaria, 187. 
Cyrena africana var., 339. 
Galatea paradoxa var., 368. 
Galatea radiata var., 368. 
Paludina, 195. 
olivaceus, Homorus, 511. 
639 
