288 HAWAIIAN NESOPUPAE. 



ture of the group is almost completely wanting. The furrows 

 behind the lip are only weakly impressed, the Upper one 

 wholly lateral, the lower extending to the dorsal line. Both 

 angular and parietal lamellae are long, the former reaching 

 the thickened edge of the parietal callus near the insertion of 

 the lip, the parietal lamella somewhat immersed, regularly 

 curved in a basal view. The deeply placed columellar lamella 

 is much thickened at the inner end, but is hardly bent down- 

 ward. Lower palatal fold is deeply immersed, as usual. The 

 upper palatal does not have a depression preceding the outer 

 end, such as is seen in the Oahuan species. Ancey 's type has 

 the following dimensions: length 1.6, diam. 0.98, greatest 

 length of aperture 0.67 mm. These measurements are slightly 

 greater than Ancey gave, but the specimen was labelled type 

 in his handwriting. A paratype measures: length 1.65, 

 diam. 1 mm. 



Specimens from West Maui are more like Molokai shells 

 than those of East Maui. 



Var. centralis Ancey. A little smaller and less cylindric, 

 whorls 5, otherwise scarcely differing from the type (Ancey). 



Hawaii: Olaa (Thaanum). 



Very close to the typical Mauian form. In an Olaa speci- 

 men from Thaanum (no. 79991 A. N. S. P.) the surface 

 shows no ribs, but there are some striae on the last fourth of 

 a whorl. The upper palatal fold is indicated externally by a 

 slight impression, the lower by a shallow, broad concavity, both 

 being quite short for this species. It measures, length 1.65, 

 diam. 1.05 mm. 



Specimens from Keehia, Hawaii, collected by Mr. Thaanum 

 are almost exactly similar to Ancey 's type specimen. They 

 are less distinctly costulate than those of Lanai, West Maui 

 and Molokai. 



5&. Nesopupa baldwini subcostata P. & C., 11. subsp. PL 27, 

 figs. 11, 12. 



The surface is distinctly and closely costulate, the riblets 

 not very strong, sometimes irregularly developed. Sulcus 

 over the lower palatal fold well marked, the upper one shallow 



