ACHATINELLA VULPINA. 219 



Length 20, diam. 11.5 mm. ; 6 whorls. 



Length 20.3, diam. 10.6 mm. ; 6!/4 whorls. 



There is also a stunted valley form of this race. A lot 

 pi. 39, figs. 9 to 9c, from the floor of Nuuanu, taken by Mr. 

 B. A. Cooke in an isolated group of two or three lehua trees, 

 near the southern side of the valley, has no ernestina pattern. 

 The shells are wax yellow, the same shading below into tawny 

 (fig. 9c) or very rarely the dark typical vulpina pattern like 

 pi. 39, fig. 1, or streaked with green on a nearly white or citron 

 ground (figs. 9, 96). There are often a few faint green 

 spiral lines, or a very dilute brown sutural line. They have 

 the small size of other lots from the floor of the valley, length 

 13 to 17.3 mm. It was abundant, as about a hundred speci- 

 mens were taken by Dr. C. M. and R. A. Cooke. 



Somewhere on the southern ridge Dr. Cooke collected speci- 

 mens like pi. 39, f. Sb, but with a sutural band. Also a small 

 form with the base olive, the rest white, embryonic whorls 

 ochraceous or with a wide ochraceous band. The typical 

 castanea pattern was taken by Mr. Gulick on the Pauoa side 

 of Nuuanu (pi. 39, fig. 2), exact locality not known to me. 



Northwestern ridge of Nuuanu. Hillebrand's Glen, (pi. 39, 

 figs. 12 to 12d, coll. by R. A. Cooke), in a dark and humid 

 locality on the east side, is probably at the eastern limit of 

 the longispira pattern. Some specimens are scarcely distin- 

 guishable from the yellow ernestina pattern, uniform or with 

 chestnut base ; others have the green olivacea pattern. The 

 longispira pattern is usually pale yellow with green or green 

 and brown lines (figs. 12c, d.). This colony is therefore a 

 hybrid of vulpina, olivacea and longispira. 



On the northern ridge of Nuuanu there are other colonies 

 having the same and other patterns in varying proportions, 

 such as pi. 39, figs. 13 to 13/; pi. 39, figs. 14, 14a. Also pi. 

 39, figs. 10, 10a, from a lateral ravine of northern Nuuanu, 

 patterns of the virens-longispira group, but reminiscent of 

 castanea. Others specimens from the main northern ridge, 

 coll. by Dr. Cooke, are similar to the yellow form of ernestina. 



1 1 Nuuanu on the Kalihi side ' ' is the locality of several lots 

 of olivacea in the Gulick collection. The shells are like pi. 



