TOBNATELLIDES OF HAWAIIAN ISLANDS. 225 



In an immature specimen from Olokele with 5 whorls the 

 shell is obliquely annulate at the periphery; the columella is 

 furnished with two almost transverse, rather strong white 

 folds, of which the lower is slightly stronger than the upper. 

 The parietal lamella is strong and oblique, about 0.18 mm. in 

 height. The upper columellar fold is 0.06, the lower 0.12 

 mm. in height (fig. 2). 



30a. T. PERKINSI ACICULA n. subsp. PL 49, figs. 3, 4. 



Specimens from Oahu, Molokai, Lanai and West Maui dif- 

 fer somewhat from the typical form of Kauai. Their spires 

 are more slender and their apices decidedly more acute. The 

 parietal lamella is, also, slightly stronger. This subspecies is 

 rather widely distributed on the four islands but is never 

 abundant in any one locality. Most of the specimens were 

 taken on the dead leaves of Pandanus or ieie (Freycvnetia 

 arnotti). A specimen from Punaluu, Oahu, is selected for 

 the type of this subspecies. It measures: length 3.0, diam. 

 1.3, axis of apert. 0.8, par. lam. 0.09, umb. 0.23 mm. and has 

 714 whorls. Most of the adult specimens from this locality 

 have the front of the parietal lamella irregularly eroded. 

 This feature has not been found in any specimens from other 

 localities. It occurs also in Nuuanu (Glen Ada) and on Mt. 

 Tantalus. 



In an immature specimen with 5% whorls the parietal la- 

 mella is 0.21 mm. in height. It is indistinctly striate, the 

 striae being nearly parallel with its base. The upper colu- 

 mellar fold is 0.09, the lower 0.13 mm. in height. Its em- 

 bryonic whorls are not spirally striate. 



An embryonic shell from Waimea, Oahu, is minutely per- 

 forate. The first whorl is minutely spirally striate, the second 

 faintly transversely striate. The parietal lamella is well de- 

 veloped and the columella is furnished with a rather strong 

 basal fold (fig. 3). Types in B. P. B. Mus., cotypes no. Ill, 

 839 A. N. S. P. 



31. T. COMES P. & 0., n. sp. PL 49, figs. 7, 8. 



The shell is pyramidal, umbilicate (the axial perforation 



