xii CONTENTS. 
PAGE 
Gass II. Gasteropopsa. Orper II. PuLMONIFERA............ 285 
Beerian Ay -INOPERCULATA® .. iSsS% 6.4 54s bo ee eee 285 
Fam. I. Helicide.—Helix, Vitrina, Succinea, Bulimus, 
- Achatina, Pupa, Cylindrella, Balea, Tornatellina, Paxillus, 
MCAS HARTAA 35 o's aia bis Gye? isa, awe n'a s sea Ro eee ee 288 
Fam. Il. JLimacide.—Limax, Anadenus, Incilaria, Arion, 
Parmacella, Janella, Aneitea, Parmarion, Triboniophorus, 
Waquesnelia,“Vestacellay sy... 0. asb. 25.5 +2se ee eee 295 
Fam. III. Oncidiade.—Oncidium, Vaginulus ............ 299 
Fam. IV. JLimneide.—Limnea, Chilinia, Physa, Ancylus, 
LE PENCE Oy eR AA er he > 300 
Fam. V. <Avwriculide.—Auricula, Conovulus, Carychium 
(GSIPUOMATIA) 0. oc pects Se o/sls o's be Vidal ole ORE 308 
Secrion B. OPeERCULATA ...::,..... dissapear 305 
Fam. VI. Cyclostomide.—Cyclostoma, Ferussina?, Cyclo- 
puorus, Pupina, Elelicina, Stoastoma ...........5sesesee 306 
Fam. VII. Aciculide.—Acicula, Geomelania .............. 310 
ror Mi > OrisTHO-BRANCHIATA) 02:0. 5m 00-0100 +45 ee eee 311 
SECTION AU) “AECTI-PRANCHIATA,, 5/0. ./.).\s:06 «cs ses «bo ee ee 312 
Fam. I. Tornatellide.—Tornatella, Cinulia, Ringicula, Glo- 
biconcha, Varigera, Tylostoma, Pterodonta ?, Tornatina?.. 312 
Fam. Il. JBullide.—Bulla, Acera, Cylichna, Kleinella?, 
Amphisphyra, Buccinulus, Aplustrum, Scaphander, Phi- 
line, Doridium, Gastropteron, Physema ..............+.. 315 
Fam. III. <Aplysiade.—Aplysia, Dolabella, Stylocheilus, 
Dolabrifera, Siphonopyge, Notarchus, Icarus, Lobiger.... 320 
Fam. IV. Plewrobranchide. — Pleurcbranchus, Postero- 
branchea, Runcina, Neda, Susaria, Umbrella, Tylodina .. 322 
Fam. V. Phillidiade.—Phyllidia, Fryeria, Hypobranchiza, 
Wiphy Midis 1.332480 0.8 oo sete ene cutee eee . 824 
Suction 15. NuUDIBRANCHEATA? j {2 ict ns'e eis Uevw'sin soe oe 325 
Fam. VI. Doride.—Doris, Heptabranchus, Hexabranchus, 
Atagema, Actinocyclus, Chromodoris, Asteronotus, Glos- 
sodoris, Goniodoris, Triopa, Adgirus, Thecacera, Polycera, 
Idalia, Ancula, Ceratosoma, Trevelyana, Crimora, Pelagella, 
Gymnodoris, Acanthodoris, Casella, Brachychlamis ...... 328 
Fam. VII. Tritoniade.—Tritonia, Scyllea, Tethys, Bornella, 
Dendronotus, Doto, Gellina, Meliboea, Lomanotus ...... 332 
Fam. VIII. _olide.—ZXolis, Glaucus, Fiona, Embletonia, 
Calma, Favorinus, Galvina, Cuthonia, Filurus, Proctonotus, 
Antiopa, Hermza, Alderia, Chiorera .............-2.0: 338 
