$80 Cephalophora ; Güsteropoda. 
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Firoloida, Les. 
Pterosoma , Lesson, 
Atlanta, Les, 
Lippistes , Montf, 
Ordo 2, Gymnobranchia., ( Nudibranches, Cuv.) 
Subordo 1, Cyclobranchiata, Blainv. (Pygobranchia, 
Gray, ; Anthobranchia , Goldf.) 
Fam, 1. Doridea, 
Doris , Cuv. 
Polycera, Cuv. (Themisto, Ok.) 
Idalia, Leuck. (Okenia, Leuck.) 
Onchidoris, Blainv. (Onchidiorus, Fér.) 
Peronia , Blainv, (Onchis, Fér.; Onchidia marina, 
Cuv.) 
Placobranchus, Hass. 
Subordo 9, Polybranchiata, Blainv. 
Fam. 9. Tritoniacea, (Dicerata , Blainv,) 
Tritonia, Cuv, ) 
Doto, Ok. 
Tethys, L. 
Scyllaea, L. 
Dermatobranchus , Hass, 
Fam. 5, Glaucea, (Tetracerata , Blainv,) 
Glaucus, Forster, 
Laniogerus, Blaiuv. 
Tergipes, Cuv. (Aeolis, id 
Cavolina , Br. 
Eolidia, Cuv. (Eolis, Lam.) 
