TOKNATELLIDES OF HAWAIIAN ISLANDS. 219 



unexpanded, the outer margin arcuate near the insertion, 

 columellar margin expanded, hardly closing the perforation. 

 In the young stage the columella is triplicate. Length 2.75, 

 diarn. 1.33, alt. apert. 1 rnm." (Ancey). 



Hawaii: Hamakua District; fossil (Henshaw). Type no. 

 18425 Bishop Museum, topotypes 36260 Bishop Museum and 

 no. 111718 P. A. N. S. 



Tornatellina cyphostyla ANCEY, Joum. of Malac., xi, 1904, 

 p. 70, pi. 5, f. 22, 23. HENSHAW, t. c., p. 64. 



"A very distinct species, of regular outline. Its principal 

 characters are the conic spire, barely convex whorls, ap- 

 pressed suture and oblong aperture not at all widened below 

 and slightly oblique. The columellar margin is gently curved 

 and without plicae except in young specimens, and the parietal 

 lamella is rather long" (Ancey). 



This species is very abundant in the fossil earth from Ha- 

 makua. Unfortunately the margin of the peristoine of the 

 type specimen is slightly broken. A perfect specimen from 

 the same lot of earth as Aiicey's type measures: length 2.8, 

 diam. 1.4, axis of apert. 1.1, par. lam. 0.2, umb. 0.27 mm. 

 This specimen has 6% whorls. 



In an immature specimen with slightly over 5 whorls the 

 columellar folds are very deeply seated and are not as strongly 

 developed as in the other species of this group. The lower 

 fold is 0.09 mm. in height and is much stronger than the 

 upper, which forms a low, oblique fold close to the parietal 

 wall. The parietal lamella is 0.18 mm. in height. The em- 

 bryonic whorls are not spirally striate (fig. 2). 



25. T. ATTENUATUS C. & P., 11. Sp. PI. 48, figS. 3, 4. 



Shell perforate, elougately conic, in the fossil state white, 

 nearly smooth, under a strong lens minutely striate with lines 

 of growth. Spire long and straightly conic ; apex somewhat 

 obtuse. Suture simple, scarcely impressed. Whorls iy 2 , 

 nearly flat, the last elongate, tapering towards the base. Aper- 

 ture small, oval. Parietal lamella strong, oblique. Columella 

 unarmed. Peristoine simple, erect, outer margin arcuate. 

 Umbilicus small for a shell of this size, ovate. Length 4.2, 

 diam. 1.9, axis of apert. 1.5, par. lam. 0.27. umb. 0.47 mm. 



