OLTVELLA. 69 



O. LEPTA, Duclos. PL 16, figs. 4-11 ; PI. It, fig. 52. 



Narrow, with elongated spire ; a narrow chestnut line or row 

 of spots beneath the suture, a more distinct interrupted line at 

 the margin of the fasciole, and the intermediate space with 

 zigzag longitudinal lines, base of shell chestnut. 



Length, 8 mill. 



China Sea; Japan; Philippines. 



With this species I include 0. consobrina, Lischke (unfigured), 

 0. fabula, Marrat (figs. 5, 6", 0. lanceolata, Rve. (figs. 7, 8), 0. 

 pulicaria, Marrat (fig. 9), 0. exilis, Marr. (fig. 10), 0. fulgurata, 

 Ad. and Reeve (fig. 11), and 0. pellucida, Rve. (fig. 52). 



0. FORTUNEI, Adams. PL 16, figs. 12-15. 



Widely fusiform, maculated or covered with zigzag longitu- 

 dinal chestnut markings, fasciculated at the sutures. 



Length, 8 mill. 



China; Japan. 



Yery similar to the last species in markings, but differing in 

 form. I can see no good reason to separate 0. pulchra, Marr. 

 (fig. 14), a species described without locality, and I agree with 

 Weinkauff that the unfigured 0. signata, Lischke, is also very 

 closely allied. Perhaps 0. spreta, Gould, may belong here; the 

 author never figured it and the type, I suppose, was destroyed 

 by fire, in Chicago ; I give a figure which E. A. Smith identifies 

 with this species (fig. 15). 



O. LEUCOZONIAS, Gray. PL 16, figs. 16, 17. 



Orange-yellow, with zigzag chestnut lines and maculations, a 

 white band at the suture, spotted with chestnut, and another 

 white band below the middle of the shell. Length, 12-15 mill. 



Senegal. 

 O. ANAZORA, Duclos. PL 16, figs 19-23. 



Markings similar to those of the two preceding species, with 

 a form about intermediate between them. I am not able to give 

 any better distinction than the very different locality ; indeed, 

 the probability is that the future conchologist, with specimens 

 from more numerous stations, will be able to reduce the number 

 of species of Oliuella to a very few, each of them presenting 

 certain types of variation in form and coloring. 



Length, 8-13 mill. 



Xipixapi, W- Columbia; Acapulco; Mazatlan. 



