TORNATELLIDES OF HAWAIIAN ISLANDS. 239 



In this species usually only the upper columellar fold is 

 present in adult specimens. Sometimes the lower fold is rep- 

 resented 'by a faint raised line. T. brunneus is more nearly 

 related to T. macroptychia than to any other species of the 

 group. It differs slightly in size, less tapering base, etc. 



In an immature specimen, with slightly more than 5 whorls, 

 the parietal lamella is large, slightly oblique, 0.23 mm. in 

 height. The columellar folds are strong, and nearly equal in 

 size. The upper is 0.16, the lower 0.18 mm. in height (fig. 5). 



In an embryonic specimen the shell is minutely perforate 

 and the surface is smooth, there being no indications of spiral 

 lines. 



44. T. MACROPTYCHIA (Ancey). PL 51, figs. 8, 9. 



Shell perforate, narrowly conic, brownish-corneous, with a 

 silky surface, minutely striate with lines of growth, thin, 

 slightly diaphanous. Spire narrowly conic, apex obtuse. Su- 

 ture impressed, minutely crenulate, indistinctly narrowly 

 margined. Whorls 6, the embryonic increasing rather rapidly, 

 the rest closely coiled, increasing slowly, convex, the last ob- 

 long, tapering towards the base. Aperture truncate-ovate. 

 Parietal lamella moderate. Columella narrowly triangular, 

 furnished with two nearly equal, oblique folds, of which the 

 upper is slightly stronger. Peristome thin, erect, the outer 

 margin regularly curved. Umbilicus minute, circular. 

 Length 2.8, diam. 1.4, axis of apert, 1.0, par. lam. 0.12, umb. 

 0.14 mm. 



East Maui: Kaupakalua (Baldwin), Ukulele (Forbes). 

 Type (immature) no. 18437 Bishop Museum, paratype 

 (adult) 36262 Bishop Museum. Cotypes no. 111835 P. A. 

 .N. S. 



Tornatellina macroptychia, ANCEY, Journ. de Conchyl., li, 

 1903, p. 305, pi. 12, f. 21, 22. 



Unfortunately the material from which Ancey described 

 this species was not adult. Adult specimens occur in the An- 

 cey collection in two unassorted lots, but were not recognized 

 by him. The columellar folds persist in T. macroptychia 

 longer than in most of the species of this group. T. macrop- 



