AMASTRA, OAHU. 219 



Wahiawa topotypes of nigrolabris from the Gulick collec- 

 tion measure : 



Fig. 14. Length 18.7, diam. 11.8, aperture 9 mm. 



Pig. 15. Length 20.5, diam. 11, aperture 8.5 mm. 



In Kahana valley (C. M. Cooke coll.) the shells are rather 

 small. Some have typical spirizona pattern, others transi- 

 tional, others typical nigrolabris pattern (pi. 35, figs. 11. 13). 

 Specimens measure : 



Length 16, diam. 10 mm. 



Fig. 11. Length 19.5, diaim. 10.8 mm. ; G 1 /^ whorls. 



Fig. 13. Length 19, diam. 11 mm. 



Length 18.3, diam. 9.5 mm. 



Specimens have been examined from Waimea, Kawailoa 

 (fig. 10), Helemano, Wahiawa, Opaiula, Ahonui, and Kalai- 

 koa on the southern slope of the range, collected by Gulick, 

 and from Kalmna on the northern slope, collected by C. M. 

 Cooke, Jr. 



A few specimens from Kawailoa, Helemano and Wahiawa 

 have the base of the shell of a rusty red-brown color, in place 

 of the usual dark purple-brown, the upper surface being light 

 buff. These forms resemble A. s. rudis save that the light 

 band extends to the periphery. 



48&. A. s. rudis (Pfeiffer). PI. 33, fig. 10. 



Shell subimperforate, ovate-turrite, solid, rudely striate, 

 fulvous-brown; spire elevated-conic, the apex rather acute, 

 suture simple, very lightly crenulate. Whorls 7^/2, moderately 

 convex, the last scarcely forming two-fifths the total length, 

 rotund. Aperture oblique, sinuate-oval; columellar fold me- 

 dian, laminiform, subtransverse ; peristome simple, acute, the 

 columellar margin dilated, reflexed, subadnate. Length 21, 

 diam. 11.5, aperture 9 mm. long, 5 wide (Pfr.) . 



Var. 6. Chestnut, with buff median and basal bands, spire 

 less lengthened (Pfr.}. 



Sandwich Is. (Frick). 



Achatinella rudis PFR., P. Z. S., 1855, p. 5. pi. 30, f. 17; 

 Monogr., iv, 549. 



Pfeiffer's type figure, copied in fig. 10, represents a form 



