XII CONTEXTS. 



PAGE 



O.A.sIL Gasteropoda. Ohder II. Pulmonifera 285 



Section A. Inopergulata 285 



Fam. I. HelicidcE. — Helix, Vitrina, Succinea, Bulimus, 

 Achatina, Pupa, Cylindrella, Balea, Tornatellina, PaxiUus, 

 Clausilia _. 288 



Fam. II. Limacidce. — Limax, Anadenus, Incilaria, Arion, 

 • Parmacella, Janella, Aneitea, Parmarion, Triboniophorus, 

 Viquesnelia, Tostacella 295 



Fam. III. Oncidiadce. — Oncidium, Vaginulus 299 



Fam. IV. Limnmidce. — Limnsea, Chilinia, Physa, Ancylus, 

 Planorbis 300 



Fam. V. AuricuUdcB. — Ata-icula, Conoyulus, Carychium 

 (Siphonaria) 303 



Skction B. Opergulata 305 



Fam. VI. CydostomidcB. — Cyclostoma, Ferussijia?, Cyclo- 



phorus, Pupina, Helicina, Stoastoma 306 



Fam. VII. Aciculidce. — Acicula, Gcomelaiiia 310 



Order III. Opistho-rranchiata 311 



Segtiox a. Tegti-branghiata 312 



Fam. I. Tornatdlidce. — Tornatella, Cinulia, Pingicula, Glo- 



biconcha, Varigera, Tylostoma, Pterodonta ?, Tornatina ?. . 312 

 Fam. II. BulUdce. — BuUa, Acera, Cylichna, KleineUa?, 



Amphisphyra, Buccinulus, Aplustrum, Scaphander, PM- 



line, Doridium, Gastropteron, Physema 315 



Fam. III. Aplysiadce. — Aplysia, Dolabella, Styloclieilus, 



Dolatrifera, Siplionopyg-e, Notarchus, Icarus, Lobiger .... 320 

 Fam. rV. FkurobranchidcB. — Pleurobranch.us, Postero- 



branclia3a, Euncina, Neda, Susaria, Umbrella, Tylodina . . 322 

 Fam. V. Fhillidiada. — Phyllidia, Frycria, Hypobrancliisea, 



Diphyllidia 324 



Section B. Nudibranghiata . .* 325 



Fam. VI. JDondcB. — Doris, Heptabranclius, Hexabranchus, 

 Atagema, Actinocyclus, Chromodoris, Asteronotus, Glos- 

 sodoris, Gouiodoris, Triopa, iEgirus, Thecaccra, Polycera, 

 Idalia, Ancula, Ceratosoma; Trevclyana, Crimora, Pelagella, 

 Gymnodoris, Acanthodoris, CascUa, Brachychlamis 328 



Fam. VII. Trifoniada;. —Tritonia., ScyUtioa, Tethys, BorneUa, 

 Dendi-onotus, Doto, GclHna, IMcliboea, Lomanotus 332 



Fam. VIII. JEolidce. — iEolis, Glaiicus, Fiona, Embletonia, 

 Calma, Favorinus, Gah'ina, Cuthonia, I^'iluius, Proctonotus, 

 Antiopa, Hermaja, Aldefia, Cliioraera 335 



