INDEX. 
Note. — F or the purposes of this index, sections are treated as genera 
Abra 477. 
ajqualis 477. 
lioica 478. 
longicailus 478. 
Aeanthochites 454. 
astriger 455. 
hemphilli 455. 
spiculosus 455. 
Acanthopleura 454. 
granulata 454. 
mucronulata 454. 
Acar ( see Area). 
Achatina (see Spiraxis). 
glabra 374. 
riisei 373. 
subula 374. 
Achatinidse 374. 
A cm sea 
candeana 440. 
leucopleura 440. 
pulcherrima 440. 
punetulata 440. 
Acmseidae 440. 
Acrilla 41 !. 
Actseon 
punctostriatus 362. 
tornati.is 302. 
Acta;onidie 302. 
Akeratidie 304. 
Akteophila 308. 
Alaba ( see Elachista). 
melanura 431. 
tervaricosa 431. 
Aloidis 472. 
Alvania 433. 
Amalthea 
antiquata 437. 
subrufa 437. 
Amaltheidse 437. 
Amnicola (see Potamopyrgus). 
Amphibulimina? 377. 
Amnsium 460. 
Amygdalum 170. 
Anachis 404. 
Anatinacea 498. 
Ancistrosyrinx 384. 
Ancylidee 371. 
Ancylus 
beaui 371. 
obscurus 371. 
Angulus 480. 
mera 481. 
Anisopleura 360. 
Anodontia alba 492. 
Anomalodesmacea 497. 
Anomalocardia 484. 
Anomiacea 468. 
Anomia simplex 468. 
Anomiidse 468. 
Antalis 455. 
Aplexa sowerbyana 371. 
Aplysia ( see Tethys and Notarchus) . 
Aplysiidae 365. 
Area 459. 
barbata 460. 
Candida 400. 
adamsi 461. 
americana 461. 
campechensis 461. 
chemnitzi 461. 
deshayesii 461. 
d'orbignyi 461. 
occidentalis 459. 
reticulata 460. 
secticostata 461. 
umbonata 460. 
Arcacea 459. 
Arcidae 459. 
Areopagia 479. 
Artemis (see Dosinia). 
concentrica 486. 
Asaphis 475. 
coccinea 476. 
Aspella 409. 
anceps 410. 
scalaroides 410. 
Astralium 441. 
americanum 442. 
coelatum 442. 
longispinum 442. 
tuber 442. 
Astyris 405. 
Atys 364, 365. 
cymbulus 364. 
guildinii 365. 
sandersoni 365. 
Atlanta peronii 415. 
Atlantidse 415. 
Atrina rigida 462. 
Auriculidse 368. 
Avicula (see Pterin). 
Axinus (see Thyasira). 
Balea (see Pseudobalea). 
Barbatia 460. 
Basommatophora 368. 
Basterotia 472. 
Bifidaria pellucida 372. 
Bittium 
eerithidioide 427. 
clachistum 427. 
and varieties as species. 
Bi ttiu m — Con tin ued. 
varium 426. 
Blauneria heteroclita 369. 
Bleeding tooth shell 445. 
Bivonia decussata 429. 
Borsonia 388. 
rouaulti 388. 
Botula 
semen 470. 
Brachypodella 377. 
pallida 377. 
portoricensis 377. 
riisei 377. 
Brachypus 377. 
Bulimnlidae 377. 
Bulimulus 378. 
diaphanus 378. 
exilis 378. 
eyriesii 378. 
Bulimus (see Macroceramus, Opeas, 
Subulina, Pineria, Simpulopsis, Buli- 
mulus, Drymaeus, Stenogyra). 
nitidulus 372. 
Bulla 363. 
Bulla (see Haminea, Ultimus, Volvula), 
ampulla 363. 
amygdala 363. 
eoft'ea 368. 
guildingi 364. 
pallida 395. 
physis 364. 
striata 364. 
undata 364. 
Bullidae 363. 
Buccinidae 399. 
Buccinum (see Anachis, Cassis, Dolium, 
Latirus, Nassa, Nitidella, Pisania, 
Planaxis, Terebra, Tritonidea). 
coromandelianum 400. 
patulum 410. 
Cadulus 
acus 457. 
amiantus 457. 
bushii 457. 
carolinensis 457. 
minusculus 457. 
C.vlliostoma 
jujubinum 444. 
rawsoni 444. 
Callocardia pilula 496. 
Calyptrsea 
candeana 437. 
Calyptra-idae 436. 
Cancellaria 390. 
agassizii 391. 
517 
