220 TORNATELLIDES OF HAWAIIAN ISLANDS. 



Oahu. Manoa, fossil (Cooke). Type no. 14134 Bishop Mu- 

 seum, cotypes no. 111714 P. A. N. S. Also Kaelepulu, Kai- 

 lua (Pilsbry), and Laie, west of the stream, between the road 

 and the sea, in a deposit of calcareous sand (Cooke and Pils- 

 bry). 



The appearance of this species is something like that of T. 

 cyphostyla Anc. It is much larger, the whorls are slightly 

 flatter, the aperture is broader in proportion to its length, 

 etc. It resembles T. insignis in the shape and the minute 

 axial perforation, enlarging at the last whorl ; but it differs by 

 the smoothness of the surface. 



An immature specimen with 5y 2 whorls has the columellar 

 folds deeply seated. The upper is low, transverse and indis- 

 tinct, about 0.05 mm., the lower is parallel and 0.13 mm. in 

 height. The parietal lamella is 0.21 mm. in height. In some- 

 what smaller neanic shells from Laie the columellar lamellae 

 are larger than in the example figured. 



26. T. INSIGNIS P. & C., n. sp. PL 48, figs, 10, 11, 12, 13. 



The shell is pyramidal, with moderate umbilicus, but an 

 extremely small perforation of the axis. Spire straight-sided, 

 the apex small but obtuse. Whorls &y 2 to 7, the first convex, 

 the rest nearly flat, the last whorl rounded below, its last half 

 (more or less) flattened peripherally. Sculpture of slightly 

 irregular, low rib stria, strongest on the last whorl, diminish- 

 ing upwards. The aperture is irregularly ovate ; parietal la- 

 mella very wide, and fully a half-whorl long. Outer lip a 

 trifle expanded. Columellar margin broadly dilated, un- 

 armed. There is a low palatal callus, peripheral in position. 

 Length 3.5, diam. 1.6, aperture 1.3 mm. 



In the neanic stage there are two rather small, subequal, 

 columellar lamellae (fig. 12). 



Oahu: fossil in shell-deposits on ledges of the " coral bluff," 

 11/2 miles west of Kahuku (Cooke & Pilsbry). Type no. 

 112535 A. N. S. P., cotypes in B. P. B. Mus. 



This shell stands nearest to T. attenuatus, a smooth species. 

 The sculpture is much less emphatic than in T. rudicostatus 

 of Hawaii, and the shape is quite different. Probably they 



