142 T< (KNATELLIK A. 



to us by the original description only. It is not certainly 

 known to belong to the biliniH U<il<i group. 



(in mi) of T. perplc.ru. 



Small, delicate species, very similar to those of the section 

 Tnni<il< Ilinops, from which they differ by having an acute 

 lamella, superposed upon the weak columella fold. They differ 

 I'mm Luntillina by lacking well-developed vertical ribs within 

 the palatal wall, yet in some species the two groups are 

 .scarcely distinguishable. The delicate palatal denticles are 

 uHen absent in adult shells. The nean'ic stage is like the adult 

 in j>< rplera and iuiida. 



5. T. BALDWIN: Ancey. PI. 35, figs. 3, 4 ; pi. 40, fig. 13 ; pi. 42, 

 figs. 1, 2. 



Shell oblong-ovate, irnperforate, thin, pellucid, corneous, 

 glossy, under a lens slightly striatulate. Spire conoid, a little 

 longer than the aperture, the summit subacute. Whorls 4, 

 convex, rapidly increasing, the last oblong. Aperture acutely 

 oblong-ovate, hardly compressed outwardly, bearing a rather 

 minute revolving lamella on the parietal wall. Columella 

 thickened, whitish, toothless, obliquely twisted, continued into 

 the anterior margin. Length 2.5, diam. 1.5, length of aper- 

 ture 1.2 mm. (Ancey}. 



Kauai (Baldwin, Cooke) ; Oahu: Manoa (Baldwin), Tan- 

 talus (Baldwin, Cooke), Nuuanu (Cooke), Waianae Mts. 

 (Perkins, Cooke); Maui: Kaupakalua and Keauae (Bald- 

 win) ; Hawaii (Thaanum). In the pleistocene of Oahu at 

 Kaelepulu, Kailua, Laie and iy 2 miles W. of Kahuku. 



TortutlcHina baldwini ANC., Bull. Soc. Malac. France, vi, 

 1SS9, p. 238; Journ. de Conchyl., li, 1903, p. 296, pi. 12, figs. 

 1. 2. SYKES, Fauna Hawaiiensis, Moll., p. 380. 



'The specimen from Oahu which served for the description 

 was not fully developed. In the adult stage the species is a 

 little larger, with one whorl more, and the spire is a little 

 longer. The characters of the aperture remain the same" 

 (Ancey}. Mr. Ancey 's figures are copied, pi. 35, figs. 3, 4. 



This species and T. i)ii't/rr</<iri are more obese than other 



