262 TORN ATELL ARIA. 



of Molokai. In immature specimens from this island the 

 upper columellar fold is slightly stronger than the lower. 



A form of T. trochoides is also found on Hawaii. Living 

 examples were collected at Waimea by Mr. Thaanum. The 

 whorls are not as closely coiled as in typical specimens of 

 trochoides and the spire is slightly more convex in outline. 

 The parietal lamella is decidedly weaker. The shells are 

 slightly shorter and broader. What appears to be a nearly 

 adult shell with 6% whorls measures: length 4.2, diam. 

 2.5 mm. 



The fossil material from Hawaii is much closer to the typical 

 form, scarcely distinguishable. Adult specimen with 7% 

 whorls measures, length 4.05, diam. 2.15 mm. This is un- 

 doubtedly the form erroneously referred to T. newcombi by 

 Ancey, Journ. of Malac. xi, 1904, p. 63. 



8. T. CINCTA (Ancey). PI. 55, figs. 1, 2. 



Shell long-conic, minutely umbilicate, thin, fulvous, the last 

 whorl encircled by a more or less distinct whitish median zone. 

 Spire long, conic, rectilinear, the apex minute, a little obtuse. 

 Whorls 8, flat, parted by a linear suture, nearly smooth, hav- 

 ing a rather oily gleam, narrowly coiled, regularly and slowly 

 increasing, the last indistinctly angular, chiefly at its begin- 

 ning, rather short, quite abruptly tapering. Aperture oblique, 

 armed in the middle of the parietal wall with a compressed, 

 very prominent, whitish, thin, revolving lamella. Columella 

 acutely biplicate, straight, the folds oblique, subequal, reach- 

 ing to the margin. Peristome simple, acute, unexpanded, the 

 columellar margin expanded in a long triangle over the um- 

 bilicus ; margins remote. Length 5, diam. 2.5, aperture 2 mm. 

 (Ancey). 



E. Maui: Mukuwae, Kaupakalua (Baldwin) ; W. Maui: lao 

 Valley (Thaanum), Lahaina (Forbes, Cooke). Molokai 

 (Baldwin, Thaanum, Cooke & Pilsbry). Lanai (Forbes). 



Tornatellina cincta ANCEY, Journ. de Conchyl. li, 1903, p. 

 297, pi. 12, f . 5, 6 ; Journ. of Malacology xi, p. 69. 



This shell, large for the genus, is doubtless spread over the 

 whole Hawaiian archipelago, though it has not yet been re- 



