HAWAIIAN NESOPUPAE. 315 



Length 1.53, diam. 0.98 mm. 414 whorls; (fossil) Rocky 

 Hill, Oahu ; 39832. 



Boettger mentions only five lamellae in the typical form of 

 this species. In most of the races examined by us, a low 

 lamelliforni basal fold is present. 



15&. Form multidentata-. Page 309, figs, 3, 3. 



An easily recognized form that is widely distributed on 

 Oahu is somewhat larger than the typical form. Living ex- 

 amples are only found on damp moss-covered stones. The 

 aperture is usually furnished with 9 or 10 lamellas and folds, 

 the infraparietal, suprapalatal and basal being present in all 

 the specimens examined. The interpalatal was present in 

 about 90% of the specimens, and the infrapalatal and sub- 

 columellar in about 20%. Angular lamella not very long, 

 lamellifonn. 



Length 1.9, diam. 1.12, apert. (diag.) 0.83 mm.; 4% whorls. 

 Glen Ada, Nuuanu. 



Length 1.95, diam. 1.3 mm. Glen Ada, type. 



15c. Form an gust a-. Page 309, fig. 4. 



The most abundant form on Kauai, and one which is nearly 

 uniform in all its characters, is longer and slightly narrower 

 than the typical form; the angle lamella is somewhat longer 

 than in the form already described. A low lamelliforni basal 

 fold is always present. There are about 20 riblets on the last 

 whorl and most of the shells are somewhat darker in color 

 than the other forms. An adult specimen with 4% whorls 

 measures: length 1.96, diam. 1.15, apert. (diag.) 0.73 mm. A 

 similar form though slightly smaller is found on Oahu. An 

 adult specimen with 4% whorls measures: length 1.83, diam. 

 1.1, apert. (diag.) 0.73 mm. 



lod. N. newcombi interrupta C. & P., n. subsp. Page 309, 



figs. 4o--6cr. 



In the following races the angle lamella is discontinuous; 

 there is a nodular outer and a lamelliforni inner portion. 

 From a number of fossil deposits of Kona, Hawaii, specimens 



