264 TORNATELLARIA. 



parent, somewhat shining, nearly smooth, minutely striate with 

 lines of growth. Spire long conic, with slightly concave out- 

 lines. Suture simple, lightly impressed. Whorls 7%, slightly 

 convex, the post-embryonic closely coiled, the rest increasing 

 slowly, the last slightly tumid, tapering towards the base. 

 Aperture slightly larger, proportionately than those of most 

 of the species of the genus, ovate. Parietal lamella moder- 

 ately developed, slightly oblique, its margin more distinctly 

 serrate than in any of the other species. Columella nearly 

 straight, expanded above the umbilicus, with two nearly equal 

 (the upper slightly stronger than the lower), well developed 

 folds, extending nearly to the margin. Peristome thin, un- 

 expanded, arcuate. Length 3.7, diam. 1.8, axis of apert. 1.4 

 mm. Height of parietal lam. 0.18 mm. 



E. Maui, Kaupakulua (Baldwin). Type no. 18424 Bishop 

 Mus. ; cotype 111853 A. N. S. P. 



Closely related to T. trochoides and T. cincta but easily 

 recognized by its smaller size, narrower form, more attenuate 

 spire with slightly concave outlines, and the more distinctly 

 serrate parietal lamella. The serrations are conic and rather 

 distantly separated. The embryonic whorls are encircled by 

 low indistinct spiral stria. 



This species is rather rare. 



10. T. HENSHAWI (Ancey). PL 55, fig. 3. 



Shell oblong, conic-turrite, thin, glossy, smooth, brown- 

 corneous, minutely perforate. Spire long, conic, rectilinear 

 or with the sides slightly convex, the summit minute, a little 

 obtuse. Whorls iy 2 , slowly increasing, nearly flat, separated 

 by an appressed, superficial suture, the last w r horl short, 

 rounded, very slightly, obscurely angular at the beginning, 

 base convex. Aperture oblique, round-emarginate, armed 

 with a moderate parietal lamella and two equal oblique colu- 

 mellar folds. Columella narrowly dilated above the perfora- 

 tion. Peristome simple, acute, unexpended, the margins re- 

 mote. Length 5 mm (Ancey). 



Hawaii: Hamakua (H. W. Henshaw) ; Olaa (D. Thaanum) ; 

 Waimea fossil (H. W. Henshaw). Type no. 18436 Bishop Mus. 



