INDEX TO MOLLUSCA. 389 
Page 
Page 
Genus, 
Family, 
Pterocera (the Scorpion-shells), 
341 
Genus, 
Helix, . . . . 
353 
Phoridse (the Comer- shells), , 
342 
Succinea, .... 
354 
Genus, 
Family, 
Phorus, , . . , 
342 
(( 
Bulimus, .... 
354 
Pterotracheidm, . 
342 
Achatina, .... 
355 
Genus, 
Family, 
Carinaria, , . . 
342 
U 
Pupa, .... 
355 
Atlantidaj, .... 
342 
(( 
Clausilia, .... 
Cylindrella, .... 
355 
Genus, 
Atlanta, .... 
Oxygyrus, .... 
342 
C( 
355 
“ 
342 
(( 
Limnophila (Fresh-water Snails) 
355 
Order 
II. Scutibranchiata, 
342 
Family, 
Auriculid®, .... 
355 
Family, 
Proserpinidse, .... 
342 
Lymn®id®, .... 
355 
Neritidse (the Nerites), . 
343 
Genus, 
Lymn®a, .... 
355 
Genus, 
Nerita, .... 
343 
Physa, .... 
356 
Neritina, .... 
343 
(( 
Planorbis, .... 
356 
il 
Navicella, .... 
343 
“ 
Thalassophila (Marine-snails), . 
356 
li'amily. 
Turbinid® (Top-shells), 
I., Turbinina (True Top-shells), 
343 
Family, 
Siphonariid®, .... 
356 
Group 
343 
Genus, 
Siphonaria, 
356 
Genus, 
Group 
Tui'bo, .... 
11., Imperatorina (jNajj-iroc/iMses), . 
343 
Family, 
Amphibolid®, .... 
356 
344 
Genus, 
Amphibola, .... 
356 
Genus, 
Imperator, .... 
344 
Group 
III., Phasianellina (Pheasant-shells), . 
344 
Genus, 
Family, 
Pbasianella (Eutropia), 
344 
Trochid® (Hoop-shells), 
344 
Class III. — PTEROPODA (the Pteropods), 
356 
Genus, 
Troclius, .... 
344 
a 
Troohiscus, .... 
Delphinula (Angarus ), . 
344 
Order 
L, Thecosomata (Shell-bearing Pteropods), 
357 
(( 
344 
Family, 
Cavolinid® (Uyalceidce), 
357 
(( 
Elenchus, .... 
344 
Genus, 
Hyal®a, .... 
357 
Family, 
Scissurellid® (Little Slit-shells), 
344 
V a 
Diacria, .... 
357 
Genus, 
Scissurella, .... 
Haliotid® (Ear-shells), 
344 
(( 
Cleodora (Clio), 
357 
Family, 
344 
u 
Balantium, .... 
357 
Genus, 
Haliotis (Ear-shell), 
344 
u 
Styliola (Creseis), 
357 
Family, 
Fissurellid® (Key-hole Limpets), 
345 
Family, 
Tripterid® (Cuvieriidce), 
357 
Genus, 
Parmophorus, 
345 
Cymbuliid®, .... 
357 
U 
Emarginula, .... 
345 
u 
Limacinid®, .... 
357 
i4 
Fissurella, .... 
345 
Genus, 
Limacina, .... 
358 
Family, 
Dentaliid® (Tooth- shells). 
346 
Order 
IL, Gymnosomata (Shell-less Pteropods), . 
358 
Genus, 
Dentalium, .... 
346 
F'ainily, 
Clionid®, .... 
358 
Entalis, .... 
346 
Genus, 
Family, 
Clio, • . . . . 
358 
Family, 
Tecturidffi (False Limpets), 
346 
Pneumoderinid®, 
358 
U 
Patellid® (Rock Limpets), 
346 
Genus, 
Pneumodermon, . 
358 
Genus, 
Patella, . ' . 
346 
Spongiobranchia, . . 
358 
Family, 
Chitonid® (Sea Wood-lice), 
347 
Trichocyclus, 
358 
Group 
I., Chitonin®, .... 
348 
F'amily, 
Cymodoceid®, 
358 
Genus, 
Chiton, .... 
Acanthopleura, 
348 
348 
Tonicia, .... 
348 
Group 
IL, Cryptoplacin®, 
348 
Class IV.— CONCHIFERA (Bivalves), 
358 
Sub-class 
11., Heterobrancliiata, . . . 
348 
Order 
L, Pleurobranchiata, 
349 
Sub-class 
L, Siphonophora, 
360 
Family, 
Philinid®, .... 
349 
Order 
I., Veneraoea, .... 
360 
Genus, 
Scaphander, .... 
349 
Family, 
Venerid®, .... 
360 
Family, 
Bullid® (True Bubble-shells), . 
349 
Genus, 
Artemis. . . . 
360 
Genus, 
Bulla, . . 
349 
(( 
Cytherea (Meretrix), 
360 
Family, 
Amplustrid®, .... 
349 
it 
Cuneus (Marbe), . . 
360 
U 
Aplysiid® (Sea-hares), 
349 
tt 
Trigona, .... 
360 
Genus, 
Doiabella, .... 
349 
it 
Dione, 
360 
Aplysia, .... 
349 
it 
Circe, .... 
360 
Family, 
Umbrellid® (Umbrella- shells), . 
350 
it 
Venus, .... 
360 
Genus, 
Umbrellas, .... 
350 
it 
Mercenaria, .... 
360 
Order 
IL, Nudibranchiata (Gymnobranchiata), 
L, Pygobranchia, .... 
350 
tt 
Chione, .... 
361 
Group 
351 
it 
Tapes, .... 
361 
U 
IL, Aiolobranchiata, 
351 
Venerupis (the Venus of the Rock), 
361 
Genus, 
(( 
Tritonia, .... 
Scyllma, 
Tethys, 
351 
Cyprina, .... 
361 
352 
Family, 
Glauconomid®, 
361 
(( 
352 
Genus 
Giauconome, .... 
Petricolida?, .... 
361 
a 
Glaucus, .... 
352 
Family 
361 
Family, 
Eolidid®, .... 
352 
tt 
Cyrenid® (Corbiculidm), 
361 
Order 
III., Pneumobranchiata (Pulmonata or Pul- 
Genus, 
Corbicula, .... 
361 
monijera), .... 
352 
Batissa, .... 
361 
Group, 
Geophila, .... 
353 
t( 
Cyrena, 
361 
U 
Limnophila, 
353 
Family, 
Cycladid®, .... 
361 
(( 
Geophila (Terrestrial Snails), . 
353 
it 
Sellinid®, .... 
362 
Family, 
Testacellid®, .... 
Testacellus (Shell-slug), 
353 
Genus, 
Sellina, .... 
362 
Genus, 
353 
it 
Psammobia, .... 
Sanguinolaria, . . 
362 
(4 
Oleacina, .... 
353 
tt 
362 
44 
Nanina, .... 
353 
it 
Semele, .... 
362 
Family, 
Helicid®, .... 
353 
tt 
Donax (Wedge-shell), . 
362 
Genus, 
Limax, .... 
353 
it 
Iphigenia, .... 
362 
