46 



THE NAUTILUS. 



of the range depends largely on the accuracy with which the 

 identifications were made. The type localities give an idea 

 of the probable range. They are given as follows : 



A. eximia (Baird), 



A. culcitella (Gould), 



A. cerealis (Gould), 



A. inculta (Gould), 



A. planata (Cpr.), 



A. smirna Dall, 



A. carinata (Cpr.), 



A. infrequens (C. B. Ad.), 



Vancouver Isalnd 

 Santa Barbara 

 Santa Barbara 

 San Diego 

 San Diego 

 San Diego 

 Mazaltan 

 Panama 



It does not seem reasonable that A. culticella Gould would be 

 found at Kodiak Island in the Arctics, or that A. infrequens C. 

 B. Ad. would be found at Santa Monica, California. A. cari- 

 nata Cpr. looks equally out of place in Zetek's list. 



All these species are comparatively little known, and the 

 differences seem to be small. The confusion in range would 

 seem most probably to be caused by a failure to secure a cor- 

 rect identification. The following comparative notes are taken, 

 from the above listed authors : 



Gould. Bulla (Akera) culcitella-. "B. tenuis Adams is the 

 only species approaching this. Some of its charac- 

 ters bring it close in alliance with the genus Torna- 

 tina. ' ' 



Bulla (Tornatina) cerealis. ' ' In form and size it is 

 scarcely to be distinguished from B. gracilis A. Ad., 

 which is transversely striated. In terms, it agrees 

 with B. infrequens C. B. Ad., but Prof. Adams 

 himself considers it a different species." 



Arnold. Tornatina cerealis Gld. "Distinguished from T. 

 culcitella by more angular whorls, mannnillated 

 apex, more keeled upper edge of whorl and smaller 

 size. ' ' 



Tornatin-a eximia Baird. "Resembles T. culcitella, 

 but has a whorl narrowed anteriorly, a spire de- 

 pressed nearly to the rim of the body whorl, a nar- 



