TORNATELLIDES OF HAWAIIAN ISLANDS. 221 



are not directly related, though they might be grouped to- 

 gether on account of the sculpture, which is stronger in these 

 two species than in any other known Tornatellinida. Both 

 species belong to the pleistocene fauna, and became extinct 

 probably in the early human period. 



27. T. PILSBRYI Cooke. PI. 48, figs. 5, 6, 7. 



Shell perforate, elongate-conic, corneous, glossy, under a 

 lens minutely striate with growth-lines, thin, diaphanous, but 

 rather strong. Spire elongate-conic, with almost straight out- 

 lines; apex slightly obtuse. Suture hardly impressed, mar- 

 gined with a broad line. Whorls nearly 7, the embryonic in- 

 creasing rapidly, convex, minutely, indistinctly, spirally 

 striate, the rest increasing slowly and regularly, nearly flat, 

 the last whorl long, tapering towards the base. Aperture 

 narrow, obliquely truncate-ovate. Parietal lamella very large, 

 oblique. Columella dilated above, furnished with two weakly 

 developed, oblique and deeply-seated folds, of which the lower 

 is the stronger until the fully adult stage is reached. Peri- 

 stome thin, erect, the outer margin regularly arcuate. Length 

 3.1, diam. 1.5, axis of apert. 1.1, par. lam. 0.29, umb. 0.3 mm. 



Oahu: Western ridge of Popowela, in the Waianae Moun- 

 tains (Cooke and Pilsbry). Type no. 36261 Bishop Museum, 

 cotypes 111838 and 110764 P. A. N. S. 



Tornatellides pilsbryi COOKE, Nautilus, xxviii, Nov., 1914, 

 p. 79. 



All the specimens collected by the junior author were on 

 the trunks of a species of Urera, a foot or two above the 

 ground. It was not abundant at the time, and a later visit to 

 the exact spot did not yield a single specimen. The senior 

 author obtained living specimens from the siftings of dead 

 leaves, taken in the place where Endodonta is abundant. 



This species is characterized by its very strong and unusu- 

 ally long parietal lamella which extends nearly a w r horl in- 

 ward. The columellar lamella? are rather long, strong and 

 oblique in the neanic stage, but nearly obsolete in the com- 

 pletely adult shell. 



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



