()26 PROCEEDINGS OF THE ACADEMY 01' [DeC. , 



6'. oxijcyma ; in others (fig. 4) it is hardly noticeable; but there 



are intermediate specimens. 



The type locality is not oNIidumate, as at first announced, but 



Minamata, Higo. The specimens figured are from that place. 



Perfectly similar forms have been sent from Togo, Satsuraa, Xo. 



760 of Mr. Hirase's collection. 



Clausilia ischna Pilsbry. PI. XXXV. figs. 15, 16. 



rils})ry, these Proceedings for 1901, Vol. LIII, p. 500 (October 2, 

 1901). 



Shell rimate, fusiform, very slender, the length about five times 

 the diameter, attenuated above, brown or pale brown, somewhat 

 glossy, finely striate, more coarsely so behind the lip. Whorls 

 11^, moderately convex, the last somewhat flattened above, having 

 a low swelling some distance behind the lip, a little produced for- 

 ward. Aperture piriform, small, slightly oblique. Superior 

 lamella rather strong, marginal, slightly oblique, continuous with 

 the spiral lamella. Inferior lamella receding, not visible in a 

 front view, but in oblique view seen to be quite strong; straightly 

 ascending within the last whorl, and giving off a distinct branch 

 toward the spiral lamella; its spiral portion weak, shorter and 

 much lower than the spiral lamella, reaching inward to a ventra 

 position. Subcolumellar lamella deeply immersed, its lower end 

 barely visible or not visible within the aperture. Principal plica 

 visible in the throat, extending inward a little past a lateral posi- 

 tion. Lunella lateral, straight and joining the middle of a very 

 short upper palatal plica above, curving strongly inward below. 

 Peristome reflexed, continuous, emarginate at the termination of 

 the superior lamella. 



Clausilium long and parallel-sided, deejily emarginate on the 

 columellar side of the filament. 



Length 1G.5, diam. 3.3, length of aperture 3 mm. 

 Length 15.7, diam. 3 mm. 



Kochi, Tosa, Shikoku Island (Mr. Y. Hirase, No. 657a). 

 Types No. 81,580 Coll. A. N. S. P. 



The somewhat stouter, paler var. JiejMs is similar to C. ischna 

 internally. 



This species is more slender than any other known member of 

 the group of C. awajiensis, and has more whorls. The closing 

 apparatus is similar to that of several other species of the group. 

 It differs from C. subaurantiaca from Deyai, Nagato, in the follow 



