12 Cephalophora ; Gasteropoda. 



Dolabella, Lanu 



Rumphii 5 Cuv. (D. callosa, Lam. Syst.) 

 Bursatella , Blainv. 

 Notarclius , Cuv. 



Fam. 5. Acera. {Aceres , Cuv. ) 



Lobaria, MiilL (Akera, Cuv. ; Doridium , Mcld. f 



Bullidium, Mckl.) 

 Gasteropteron , MckL ( Gasteroptera, Blainv. ; Par- 



thenopia , Ok. ; Sarcoptera , Raf. ? ) 

 Atlas, Les. 

 Sornietus , Fer. 

 Bullaea, Lanu 



aperta, Lam. (Bulla aperta, L. ) 

 Bulla , L. ; Lam. ; Fer» 



A. Spira involuta. (Atys, Montf.; Naucum, Schum.) 

 naucum, L. (Atys cymbulus, Montf.) 

 obovata , m. 



solida , Br. (B. cylindrica, Chemn.) 

 hydatis, L. 

 utriculus , Brocch. 

 cornea, Lam. 



B. Spira retuso 'Umhilicata, (BuUa, Schiim. ; Bullus, 



Montf. ; Rhizorus , Montf ) 

 ampulla, L.; Br. (BuIIus ampulla, Montf.) 

 striata, Br. (B. ampulla, /3, Gm.) 

 C- Spira manifesta , depressa y. convexa. ( Hydatina, 

 Schum. ) 

 physis , L. 



velum, Gm. (B. fasciata, Br.) 

 ieverensis, Schroet. (B. truncata, Adams.) 



