116 ELASMIAS. 



(Baldwin). Molokai : Puunea and Kamalo (Thaanum, Cooke, 

 Pilsbry). Oahu : western ridge of Popouwela (Spalding, Pils- 

 bry and Cooke). 



Tornatellina fusca ANCEY, Journ. de Conchyl., li, 1903, pp. 

 306, 307, pi. 12, figs. 23, 24. HENSHAW, Journ. of Malac., xi, 

 1904, p. 64. 



' ' The species of Hawaiian Tornatellina which is most closely 

 related to fusca is, without doubt, aperta; but the former is 

 more robust, more solid, darker colored, and the spire is more 

 nearly conic. It is also larger, and the lamellae though some- 

 what alike are different. In some of the young examples, 

 there are besides, two parallel dentiform plica? in the interior 

 of the right margin (a remarkable character and one not ex- 

 isting in aperta). The parietal lamella is white, prominent, 

 compressed, but does not extend far into the interior. The 

 columella has a strongly-developed callus dilation, which is 

 -flat, sinuous, and analogous to that of aperta, twisted at its 

 insertion, denticulate and broadly truncate at the end" (An- 



Ancey's type specimen (no. 18434, B. P. Bishop Museum) 

 is badly broken, as can be seen in his illustration, and it is 

 not quite adult. 



The largest specimen (fig. 1) observed is from Kona, 

 Hawaii, and was collected by Mr. Henshaw. It measures: 

 length 3.95, diam. 2.25, length of aperture 1.8 mm., and has 

 4% whorls. The parietal lamella is very strong (0.43 mm. in 

 height), arid flares outward. The columella bears a large flat 

 oblong callus (length 0.61, width 0.43 mm.) on its margin. 

 This columellar plate is thickened along its margin and this 

 thickening extends, as a rather prominent ridge, just above 

 the base, and nearly to the outer margin of the columella. 



In young specimens at the metaneanic substage, with about 

 4 whorls, the parietal fold is thickened, forming two or three 

 ridges parallel to its margin. The columellar plate is triangu- 

 lar in outline, with its inner margin sinuous and indistinctly 

 Triplicate. There are two more or less distinct palatal folds- 

 one basal the other just below the periphery. Figs. 5, 6. 



At younger stages the palatal folds are more prominent 



