640 
Lanistes, 194, 195, 197. 
Meladomus, 197. 
Planorbis, 93, 95. 
olivata, Lanistes farleri var., 200. 
oliverit, Lanistes, 183, 186. 
Oncomelania, 94. 
Ondatra, 539. 
Oopelta, 484. 
opalescens, Mutela, 429. 
opalina, Tanganikia, 304. 
Opeas, 459, 460, 499, 601. 
oranica, Kochia, 104. 
ordinarius, Melampus, 100. 
orventalis, Cyrena, 344. 
Halcyon albiventris, 477. 
Planorbis bridouxi form, 119. 
ornata, Congeria, 456, 457 (Fig. 94), 
565, 569. 
Dreissensia, 457. 
Unio hauttecceuri var., 382. 
ornatissima, Rana, 473. 
Orobanche, 509. 
orophila, Limnexa, 108. 
Orthoptera, 477, 478. _ 
orthotricha, Vicariihelix, 511. 
ortmanni, Pseudospatha, 76, 444, 
446, 588. Pl. XLV, figs. 5 and 7. 
oryzivorus, Dolichonyx, 531. 
osborni, Achatina, 506, 512. 
Dendrolimax, 503. 
Gulella, 503. 
Homorus, 499. 
oscitans, Burungaélla, 515. 
osorioi, Bulinus, 141. 
Physa, 141. 
Ostracoda, 575, 585. 
ostralegus, Heematopus, 536. 
Hzematopus ostralegus, 536. 
Ostrea, 522, 563, 564. 
Otopoma, 484. 
ouassoulout, Arthropteron, 412, 426. 
Aspatharia, 426. 
oudnoet, Iridina, 429. 
Mutela, 429. 
ovalis, Gulella, 510. 
ovampicum, Pisidium, 351, 352. 
ovata, Ampullaria, 176, 181, 182. 
 Auricula livida var., 100. 
INDEX 
Iridina, 443. 
Pachylabra, 181. 
Paludina, 242. 
Pila, 176, 180, 181, 182, 544, 568, 
577, 587. 
Syncera, 242. 
ovatum, Loxotrema, 90, 95. 
ovatus, Melampus lividus var., 100. 
Plezodon, 443. 
Pliodon, 4438. 
oviformis, Limicolaria, 461. 
ovoidea, Cambieria, 306. 
Physopsis, 146. 
Physopsis africana var., 148, 146, 
568. 
Tanganikia, 305. 
ovulus, Bulamus, 102, 1038. 
Tralia, 102. 
ovum, Lanistes, 184, 194, 195, 196, 197, 
198, 544, 560, 568, 597. 
Meladomus, 195, 196. 
owent, Neritina, 162. 
Potamides fuscatus var., 246. 
Tympanotomus, 246. 
oweniana, Nerita, 162. 
Neritina, 158, 159, 162, 561, 562, 
065, 566, 568. Pl. XIII, figs. 
16-27. 
oweni, Melania, 267. 
Neritina, 162. 
Tympanotonos, 246. 
oxyrhynchus, Rana, 473. 
Pachnodus, 491, 492, 496, 503, 507. 
Pachycheilus, 172, 248. 
Pachychiline, 248. 
Pachychilus, 248, 274, 600. 
Pachychilus, 172. 
Pachylabra, 172, 173, 181, 182. 
Pachymelania, 70, 247, 248, 250, 266, 
528, 546, 562, 565, 566, 568. 
pachyodon, Iridina, 443. 
Pleiodon ovatus var., 443. 
Pliodon, 443. 
Pliodon ovatus var., 448. 
Pachystoma, 172. 
peeteli, Planorbis, 117. 
pagodella, Vivipara constricta var., 205. 
