OL1VELLA. 7 \ 



O. B^TICA, Carpenter. PL 17, figs. 28-31, 34. 



Spire moderately elevated, sharp-pointed, body-whorl oval; 

 red-brown or gray, fasciculated upon a white band at the suture ; 

 body-whorl maculated or with zigzag markings, and sometimes 

 a white central band, fasciole white, tip of spire frequently dark- 

 tinted. Length, *75-l inch. 



Coast of California. 



W. M. Gabb identifies this species with the post-pliocene 

 0. Pedroana, Conrad (fig. 30), which would have priority, if 

 identical ; a still earlier published name is 0. alectona, Duclos 

 (fig. 34), but I am not convinced that it is the same species. 

 0. nota, Marrat (fig. 31), said to come from Vancouver's Island, 

 may be referred to the present species with more confidence. 

 0. bsetica, is a larger, somewhat more swollen form than 

 0. Anazora, but not very different. 



0. BAMA, Mawe. PI. 17, fig. 39. 



Spire and fasciole j^ellowish white, the former ash-tipped, the 

 latter sometimes bearing a band of chestnut maculations, body- 

 whorl long-fasciculated at the suture and closely reticulated over 

 the balance of the surface ; interior of aperture and columella 



violet. Length, *6-l inch. 



Guaymas, Mazatlan. 



This may prove to be a very solid variety of 0. bsetica, Carp., 

 yet possesses distinctive characters in its solidity, shorter spire 

 and violet aperture. 



O. PULCHELLA, DucloS. Pl.\17, fig. 40. 



A solid shell, sparingly marked with zigzag brown lines, and 

 maculate below the suture. Length, *18 mill. 



Cape Blanco, W. Africa. 



A doubtful species from a doubtful locality. Weinkauff 

 considers it identical with 0. leucozonias, Gray, with which it 

 appears to me to have but little in common. To me it looks 

 more like a worn specimen of 0. dama. 



0. EXQUISITA, Angas. PI. 17, figs. 32, 33, 41. 



Brownish yellow, with three rows of rather distant irregular 

 chestnut maculations, connected by undulating longitudinal 

 lines, which cover the fasciole. Length, 8-12 mill. 



N. S. Wales, Australia. 



