CONTENTS. 



PAGE 



s, Thecacera, Polycera, Idalia, Ancula, Cera- 



tosoma , 190 



Fam. VII. Tritoniadae. Tritonia, Scyllasa, Tethys, 



Bornella, Dendronotus, Doto, Melibaea, Lomanotus 192 

 Fam. VIII. JEolida. JSolis, Glaucus, Fiona, Em- 



bletonia, Proctonotus, Antiopa, Herrna3a, Alderia... 194 



Fam. IX. PhylUrhoidce. Phyllirhoe 196 



Fam. X. Elysiadce. Elysia, Acteonia, Cenia, Lima- 



pontia 196 



ORDER IV. NUCLEOBRANCHIATA 197 



Fam. I. Jirolida. Firola, Carinaria, Cardiapoda... 199 



Fam. II. Atlantida. Atlanta, Porcellia, Bellero- 



phon, Cyrtolites, Macl urea 200 



CLASS III. PTEROPODA 202 



SECTION A. THECOSOMATA 204 



Fam. I. HyaleidcB. Hyalea, Cleodora, Cuvieria, 

 Theca, Pterotheca, Conularia, Eurybia, Cymbulia, 



Tiedemannia 204 



Fam. II. Limacinida. Lirnacina, Spirialis 207 



SECTION B. GYMNOSOMA A 208 



Fam. III. Cliida. Clio, Pneumodermon, Pelagia, 

 Cymodocea 208 



CLASS IV. BRACHIOPODA 209 



Fam. I. Terebratulidae. Terebratula, Terebratella, 



\rgiope, Thecidium, Stringocephalus 215 



Fam. II. Spiriferida. Spirifera, Athyris, Eetzia, 



Uncites 



Fam. III. Rhynchonellidtf . Rhynchonella, Cama- 



rophoria, Pentamerus, Atrypa 225 



Fam. IV. Qrthida. Orthis, Strophornena, Leptssna, 



Koniuckia, Davidsonia, Calceola 229 



