220 ACHATINELLA VULPINA. 



39, fig. 126. Also virens patterns, the same green color with 

 a dark sutural band (fig. 14), or yellow, like fig. 136, or 

 like fig. 13. 



It is these lots of which a few are figured in pi. 39, figs. 10, 

 lOo., 12 to 14a, which connect the vulpina, ernestina, virens 

 and longispira so inextricably that I do not see the way clear 

 to recognize more than one species in the series. 



The typical form of Reeve's A. olivacea occurs on the sum- 

 mit of the northwestern ridge of Nuuanu. His figure is 

 copied photographically in pi. 40, fig. 3. The original descrip- 

 tion follows: "Shell oblong-conical, sinistral, whorls convex, 

 thinly margined round the upper part, columella with a 

 twisted plait. Dark olive-green, encircled with rather ob- 

 scure brownish lines, columella and interior of the aperture 

 white. 



"The rich dark olive coloring of this species leaves off 

 suddenly in an abrupt line at the aperture and the remainder 

 of the body-whorl [parietal wall] is of an orange-fawn tint, 



like a shell denuded to that extent of epidermis. Hab. ?' 



(Reeve). 



I take olivacea to include A. prasina Reeve, as the colors 

 intergrade. In fact, typical olivacea looks to me like a 

 prasina which was cleaned with hot water. All I found were 

 of purer green color. However this may be, there are speci- 

 mens in coll. C. M. Cooke which agree excellently with Reeve's 

 figure and description, from the main northern ridge of 

 Nuuanu. Two are figured, pi. 40, figs. 4, 4a. The shell is 

 indistinctly streaked with brownish olive on a yellowish olive 

 ground, and has rather indistinct spiral lines of the darker 

 shade. There is usually a dark brown line or narrow band 

 below the suture. The embryonic whorls are dirty buff, and 

 the next whorl rather brown than olive. Length 22.5, diam. 

 11.7 or smaller. 



On Waolani Peak (pi. 40, figs. 5 to 56, coll. by Pilsbry) 

 the real prasina form occurs. The last whorl is grass green 

 (but varying in shade from a deeper to a more yellowish 

 green), summit very pale buff, and the parietal wall is yellow 

 ocher. The columellar fold is white. This dark green olivacea 



