PRONESOPUPA. b 



expanded, the coluinellar margin broadly so. Aperture un- 

 armed (except in P. bvettgeri, which has sometimes a very 

 minute angular, sometimes a minute parietal lamella, but 

 more often is furnished with both). There are no palatal 

 plica?. 



Reproduction ovoviviparous. 



The Hawaiian species given below are provisionally located 

 with P. senex. Unfortunately the microscopic surface char- 

 acters of Iredale's species are not kno\vn to us, but from the 

 description and figures of his species (having 4 whorls and 

 with rather few distinct costse), P. sencx and the Hawaiian 

 species seem to be closely related. 



Nearly all the species belonging to this section are found at 

 rather low elevations, very few, as far as known, being found 

 much above 2,000 feet elevation. They are to be looked for 

 in almost any damp locality, especially in what is known as 

 the Kukui-belt (Alcurites moluccana) . 



3. PRONESOPUPA ACANTHINULA (Anc.). PI. 1, fig. 7. 



"Shell perforate, thin, transparent, dark corneous, globose, 

 hardly pupoidal, sculptured with moderately distant and thin 

 acute lamellae, very delicately and obliquely wrinkled in the 

 interstices (visible with a strong lens). Spire globose-ele- 

 vated, very obtuse. Whorls 4, convex [separated] by an im- 

 pressed suture, increasing regularly, the upper smooth, the 

 last globose, large, slightly oblique, saccate, not ascending. 

 Aperture oblique, large, toothless, slightly flattened on the 

 right side, angularly, very slightly produced forward in 

 front of the middle, obliquely truncate-ovate. Peristome 

 slightly expanded, regularly dilated at the columella. Length 

 1.5, diam. 1.5; alt. aperture 0.75 mm. Makiki, Oahu (Bald- 

 win" (Anc.). 



Length 1.4, diam. 1.25 to 1.27 mm. Rim Tantalus bowl, s.-w. 



Oahu, Koolau Range: Kahana, Kaipapau, Kaliuwaa and 

 Waiahole (Cooke) ; Kalihi (A. Gouveia) ; Makiki (Baldwin, 

 M. Desnouee) ; Tantalus (Cooke and Pilsbry) ; Palolo (Brid- 

 well) ; fossil at Malaekahana and Punaluu (Cooke). Waianae 

 Range: Green Peak and Palehua (Cooke), Kaala (Bridwell). 



