— 200 — 



Cepltala (scil. Mollusca) Fleming 1828. Brit. Anim. p. 225. 

 Etym. xEcpah'], caput. 



Priinus ordo Molluscorum. Sectiones: Natantia, 

 Gasteropoda. 

 = Cephalaea Lamck. 

 Ceplialaea (les Cephales) Lamck. 1801. Syst. an. p. 56. 

 Etym. y.scpa?M7og, ad caput pertinens. 

 Primus ordo Molluscorum, sic divisus: 



A. nuda : 



a) natantia. Genera: Sepia, Loligo, Octopus, 



Lernaea, Firola, Clio. 



b) repentia. Genera : Laplysia, Dolabella, Bul- 



laea, Telhys, Limax, Sigarctus, Onchidium, 

 Tritonia, Doris, Phyllidia, Ciiiton. 



B. conchyliifera. 



a) testa univalvi, uniloculari, non spirali, animal 



tegentc. Genera: PateHa, Fissurella, Emar- 

 ginula, Concholepas, Crepidula, Calyptraea. 



b) testa univalvi, uniloculari, spfrali, animal 



includente. 



a) apertura basi emarginata vel canab'culata. 

 Genera: Conus, Cypraea, Ovula, Terei>ellum, 

 Oliva, Ancilla, Volula, Mitra, Columbella, 

 Marginella, Cancellaria, Nassa, Purpura, 

 Buccinum, Eburna, Terebra, Dolium, Harpa, 

 Cassis, Strombus, Pterocera, Rostellaria, 

 Murex, Fusus, Pyrula, Fasciolaria, Turbinella, 

 Pleurotoma, Clavatula, Cerithium. 



/?) apertura integra. Genera: Trochus, Sola- 

 rium,Turbo, Mono<lonta, Cyclostoma,Scalaria, 

 Pupa, Turritella, Janfhina, Bulla, Bulimus, 

 Achatina, Limnaea, Melania, Pyramidella, 

 Auricula, Volvaria , Ampullaria, Plnnorbis, 

 Helix, Helicina, Nerita, Natica, Testacella, 

 Stomatia, Haliotis, Vermicularia, Siliquaria, 

 Penicillus, Carinaria, Argonauta. 



