PRONESOPUPA. 9 



forming a blunt angle just above the periphery ; usually fur- 

 nished with very small, low, tubercular, angular and parietal 

 lamella?, the former often absent; often also with a swelling 

 on the columella. The outer margin of the peristome is 

 slightly expanded, the columellar margin dilated above the 

 umbilicus. Length 1.65, diam. 1.25, aperture (diag.) 0.86 mm. 



Oahu : Tantalus (type loc.), near the southern rim of the 

 crater. Exceedingly common 011 Oahu and Kauai, not com- 

 mon on Maui and Hawaii, rather rare on Lanai and Molokai. 

 Up to the present, no specimens have been reported from 

 Niihau or KahoolaAve. 



Holotype 11030, paratypes 22021 Bishop Museum; para- 

 types 46341 A. N. S. P. 



Pupa admodesta BOETTGER, von Martens' Conch. Mittheil., 

 I, 1880, p. 58, pi. 12, f. 15. 



This is one of the most abundant species of Pupillldcc 

 found on the Hawaiian Islands. Like acanthinula, it is usu- 

 ally taken on the trunks of trees, and on the leaves of shrubs 

 and low-growing plants. Sometimes, and more often than 

 acanthinula, it is found on mossy stones, but is rarely taken on 

 dead leaves. It is mostly found in rather damp localities or 

 near streams, from about sea level to 2,000 ft. elevation. In 

 most of the colonies the stock is pure but often it is found in 

 company with its subspecies spinigera when the material 

 reaches the collection. Undoubtedly if more care was taken 

 in collecting, the specimens from each individual tree or shrub 

 kept isolated, we would find that the colonies of this species 

 and its variety are of pure stock. 



Undoubtedly this is the form described and figured by 

 Boettger as admodesta. Boettger does not mention the spine- 

 like processes of the cost. These are very delicate and 

 fragile, and usually absent, except in fresh specimens. In 

 most of our specimens a large majority of the spines have 

 been broken or nibbed off from being handled while collect- 

 ing the shells, and extracting the animals. 



Specimens with only the angular tooth present are not com- 

 mon and do not occur as a pure form. They are occasionally 

 found among specimens with an angular and parietal lamellae. 



