234 TORNATELLIDES OF HAWAIIAN ISLANDS. 



38. T. IRREGULARIS C. & P., ii. sp. PL 50, figs. 4, 5, 6. 



Shell narrowly umbilicate, narrowly ovate, brownish-cor- 

 neous, shining, somewhat diaphanous, minutely striate with 

 lines of growth. Spire ovately conic, apex subobtuse. Su- 

 ture lightly impressed, faintly margined and minutely crenu- 

 late. Whorls 7, the embryonic increasing rapidly, the rest 

 slightly convex, increasing very slowly and regularly, the last 

 rotund, sub-truncate at the base and slightly saccate. Aper- 

 ture small, ovate, obliquely truncate. Parietal lamella of 

 medium height, slightly oblique, in adult or nearly adult spe- 

 cimens the front is irregularly eroded. Columella swollen 

 above, concave below, unarmed. Peristome thin, erect, with 

 the outer margin quite convex. Length 3.7, diam. 1.65, axis 

 of apert. 1.25, par. lam. 0.16, umb. 0.35 mm. 



West Maui : Top of Mt. Kukui at about 6,000 ft. elevation. 

 Quite abundant on the leaves of shrubs (Cooke). Type no. 

 14157 Bishop Museum, cotypes no. 111723 P. A. N. S. 



This species is undoubtedly closely related to T. euryom- 

 phala but differs in its more cylindrical form, flatter whorls, 

 narrower last whorl, etc. In some cases the erosion has de- 

 stroyed most of the parietal lamella, the remaining portion 

 assuming the most fantastic forms. In young specimens only 

 the front portion of the large oblique parietal lamella is 

 eroded. 



In an immature specimen with 4^ whorls the parietal la- 

 mella is 0.23 mm. in height, there is a single deep cleft just 

 back of its outer extremity. The upper columellar fold is 

 0.11, the lower 0.18 mm. in height. In older, but not adult 

 specimens, there are from 3 to 5 deep clefts in the parietal 

 lamella (fig. 5). 



39. T. RONALDI C. & P., n. sp. PI. 50, figs. 7, 8. 



Shell perforate, elongately turrited, brownish, with lighter 

 colored embryonic whorls, surface silky, slightly glossy, under 

 a lens minutely striate, striae rather stronger than in most 

 Tornatellides, flexuous; rather thin, somewhat diaphanous. 

 Spire elongately turrited, with rather straight outlines ; apex 

 acute. Suture impressed, with its margin minutely irregu- 



