230 TORNATELLIDES OF HAWAIIAN ISLANDS. 



The eolumellar lamellae are strong and subequal in the 

 neanic stage. T. plagioptya is a larger species, with the base 

 more produced and the eolumellar lamellae more oblique. 



36. T. SPALDINGI C. & P., 11. sp. PL 53, figs. 6, 7, 8. 



Shell openly perforate, conic, corneous slightly glossy, 

 under a lens minutely striate with growth-lines, rather thin, 

 subdiaphanous. Spire broadly conic, with almost straight 

 outlines, apex rather acute. Suture simple, impressed. 

 Whorls 6, rather closely coiled, slightly convex, the last large, 

 rotund, saccate, with flattened base. Aperture rather small, 

 broadly auriform. Parietal lamella minute. Columella 

 tumid above, concave below, with two minute almost horizontal 

 folds. Peristome simple, erect, outer margin arcuate. Um- 

 bilicus large, circular. Length 2.4, diam. 1.6, axis of apert. 

 0.9, par. lam. 0.08, umb. 0.74 mm. 



Oahu: Kaaawa, type loc., on dead Paiidanus leaves (Spald- 

 ing), Ahuimanu (Spalding), ? Leilehua in the Waianae Mts. 

 ( Oooke) . Type no. 36259 Bishop Museum, eotypes no. 111845, 

 P. A. N. S. and Spalding coll. 



Closely related to T. macromphala, but shorter, wider in 

 proportion to its length and, in the typical form, with a de- 

 cidedly wider umbilicus. 



An immature specimen with 4% whorls has the columella 

 furnished with two rather strong, nearly equal folds, the 

 upper is 0.11, the lower 0.13 mm. in height. The parietal la- 

 mella is strong, oblique, 0.14 mm. in height. The first em- 

 bryonic whorl is minutely spirally striate, the second nearly 

 smooth (fig. 8). 



Specimens from Leilehua are doubtfully placed in this 

 species. The shells have approximately the same measure- 

 ments as the typical form, but the umbilicus is much less in 

 diameter. 



Group of T. euryomphala. 



Tornatellides with turrited spires, convex whorls, of a 

 brownish corneous color, and with a slightly shortened base in 

 most species. Usually the columella is furnished with one or 



