316 HAWAIIAN NESOPUPAE. 



have been collected by Thwing and Gouveia. The infra- 

 parietal and basal folds are usually present. One of the 

 specimens from Waiaha, Hawaii, measures : Length 1.65, diam. 

 0.98, apert. (diag.) 0.64 mm.; 4% whorls. 



A number of fossil specimens of this form were also found 

 at Kanapou, Kahoolawe, by Forbes and Stokes. In these the 

 infraparietal lamella was present in about half of the speci- 

 mens; the basal fold was present in all. One of them meas- 

 ures: length 1.85, diam. 1.07, apert. (diag.) 0.65; 4% whorls. 



In a fossil deposit at Kainaio, E. Maui, a few specimens were 

 found by Fleming. These are the smallest so far as seen. In 

 nearly all the infraparietal and basal folds are present. One 

 measures: length 1.47, diam. 0.98, apert. (diag.) 0.61; 4 1 /4 

 whorls. 



This form is exceedingly abundant in a fossil deposit on 

 the northern slope of Mauna Loa, Molokai. In slightly more 

 than half the specimens the infraparietal was present. The 

 basal fold was noted in all but one example. In a few speci- 

 mens infrapalatal or interpalatal plicae were seen, and in two 

 instances both of them were present in the same specimen. An 

 average shell measures: Length 1.7, diam. 1.12, apert. (diag.) 

 0.67 ; 4y 2 whorls. 



In Oahu this form is exceedingly abundant in fossil de- 

 posits, and living examples are not uncommon; most of the 

 living newcombi from the Waianse Mts. belong to form 

 interrupta. 



It sometimes varies extraordinarily in shape, 4a-d represent- 

 ing selected specimens from Kaelepulu, Kailua where it is an 

 abundant Holocene fossil. The inner portion of the angular 

 lamella is sometimes wanting. Figs. 6, 6& are from an aver- 

 age and a short example from the coral bluff west of Kahuku, 

 showing variations in teeth. The abundance of this and 

 other species of Pupillidae in this deposit is astonishing. Fig. 

 6 measures, length 1.7, diam. 1.2 mm. 



Length 1.55, diam. 1.02 mm., whorls 4%; fossil, Kailua; 

 (fossil). 



Length 1.59, diam. 1.1 mm., whorls 4 1 /* ; fossil, Kahuku ; 

 (fossil). 



