X CONTENTS. 



PAGE 



JEgii-us, Thecacera, Polycera, Idalia, Ancula, Cera- 



tosoma 190 



Fam. VII. Tritoniadce. — Tritonia, Scyllsea, Tethys, 



Bomella, Deudronotus, Doto, Melibsea, Loinanotus 193 

 Fam. Fill. M)lida. — ^olis, Glaucus, Fiona, Em- 



bletonia, Proctonotus, Antiopa, Hermsea, Alderia... 191; 



Fam . IX. Fh?/lIuiioidcB.—'Ph\]lk]ioe 196 



Fam. X. Elysiada. — Elysia, Acteoiiia, Ceiiia, Lima- 



pontia 196 



Order IV. Xucleobranchiata 197 



Fam. I. Firolidce. — Firola, Carinaria, Cardiapoda... 199 

 Fam. II. Atlantidce. — Atlanta, Porcellia, Bellero- 



phou, Cyrtolites, Maclurea . . ; 200 



Class III. Pteropoda .V L\'../ 202 



Section A. Thecosomata 204 



Fam. I. Kijaleidce. — Hyalea, Cleodora, Cuvieria, 

 Theca, Pterotheca, Conularia, Eurybia, Cymbulia, 



Tiedemauuia 204 



Fam. II. Zimacinidce. — Limacina, Spiiialis 207 



Section B. Gymnosomata 208 



Fa)}i. III. Clildce. — Clio, Pneumodermou, Pelagia, 

 Cymodocea 208 



Class lY. Brachiopoda l.(jM^u''.l. 209 



Fam. I. Terehrattdld(B. — Terebratula, Terebratella, 



Argiope, Thecidium, Stringocephalus 215 



Fam. II. Spiriferidce. — Spiiifera, Athyris, Eetzia, 



Uucites 222 



Fam. III. RhynchouellidcB. — PbyncboneUa, Cama- 



ropboria, Peutamerus, Atrj-pa 225 



Fam. IV. Ortlddce. — Ortbis, Stropbomeua, Leptseua, 



Koninckia, Davidsonia, Calceola 229 



