HAWAIIAN NESOPUPAE. 317 



Length 1.73, diam. 1.1 mm., whorls 4% ; fossil, Rocky Hill. 



Length 1.72, diam. 1.17 mm., whorls 4%; fossil, Ewa, 

 Waiane Mts. 



Length 1.78, diam. 1.1 mm., whorls 4% ; fossil, Lualualei, 

 Waianas Mts. 



Length 1.78, diam. 1.1 mm., whorls 4% ; fossil, Palolo. 



loe. Form disjuncta. Page 309, fig. 13. 



In another slightly distinct form, with a discontinuous an- 

 gular lamella, a race which is widely distributed on Oahu, the 

 infraparietal, inter-palatal, suprapalatal and subcolumellar, 

 as well as the basal are almost uniformly present. No speci- 

 mens of this race were found in fossil deposits. In a very few 

 cases the supra- and subcolumellar infrapalatal folds were also 

 noted. It is larger than form interrupts. 



Length 1.86, diam. 1.2 mm. ; whorls 4%, Mokuleia, Waiange 

 Mts. 



Length 1.78, diam. 1.17 mm. ; whorls 4%, Moanalua. 



Length 1.65, diam. 1.1 mm. ; whorls 4%, Kalihi. 



15/. N. newcombi gnampta C. & P., n. subsp. Page 309, figs. 



14, 15. 



A widely distributed form of Oahu, is nearly typical except 

 that the inner end of the columellar lamella turns abruptly 

 downward forming a right-angle, with its inner leg terminat- 

 ing at the base of the columella. One from Luakaha, Nuuanu, 

 measures: length 1.65, diam. 1.05, apert. (diag.) 0.73 mm.; 

 4% whorls. Specimens from Kauai, with a similar columellar 

 lamella, are slightly larger, one of them measuring: length, 

 1.78, diam. 1.1, aperture (diag.) 0.79 mm. 4% whorls. 



16. NESOPUPA OAHUENSIS C. & P., n. sp. PI. 29, figs. 11, 12. 



The shell is minute, perforate, broadly ovate-conic, buck- 

 thorn-brown, thin, slightly translucent, rather dull, marked 

 with distant, weak, thin, membranous riblets (about 15 to 18 

 on the last whorl), the intercostal spaces minutely striate, 

 striae parallel. Spire with slightly convex outlines, tapering 

 above to a rather sharp apex. The individual whorls are very 

 convex, separated by a deep suture. Whorls 4%, the em- 



