316 PROCEEDINGS OF THE ACADEMY OF [March, 



ischna and neptis the spiral lamella penetrates decidedly farther than 



the inferior lamella. 



Clausilia shikokuensis var. inokuchiensis nov. 



Smaller than shikokuensis, orange-brown; whorls 9-^, the early ones 

 attenuate. Length 13, diam. 3.2 mm. 



Inokuchimura, Tosa; No. 84,391, A. N. S. P., from Xo. 506c of Mr. 

 Hirase's collection. 



A small reddish form, very solid and strong, but structurally like 

 the larger brown C. shikokuensis. 

 Clausilia sus n. sp. PI. XIV, figs. l. 2, 3, 4. 5. 



Shell quite obesely fusiform, attenuate above, orange-brown, solid 

 and strong, somewhat glossy, finely striate. Whorls 8^, moderately 

 convex, the last compressed laterally. Aperture only shghtly obhque, 

 the peristome expanded and reflexed, somewhat thickened, orange- 

 brown or whitish, a little emarginate at the .position of the superior 

 lamella. Superior lamella compressed, subvertical and marginal, 

 continuous with the spiral lameha, w^hich penetrates to a point above 

 the superior lamella. Inferior lamella deeply receding, thick below, 

 penetrating as deeply as the spiral lamella. Subcolumellar lamella 

 wholly immersed or very weakly emerging. Principal plica visible 

 deep in the throat, entering to a lateral position. Upper palatal plica 

 very short and small, almost obsolete. Lunella strong and a little 

 curved inward below, very weak and low above, where it connects 

 with the middle of the upper palatal plica. 



Length 11.5, diam. 3.7 mm. 



Length 11, diam. 3.5 mm. 



Clausihum (PI. XIV, figs. 2, 3) parallel-sided, thin and acute at the 

 apex, excised on the columellar side of the filament. 



Muya, Awa, Shikoku Island. Types Xo. 84,393, A. X. S. P., from 

 Xo. 1,007 of Mr. Hirase's collection. 



The obese shape of the shell and shghtly curved lunella, very strong 

 below and weak above, are characteristic, and the acuminate, acute 

 apex of the clausihum equally so. Some specimens are less swollen, 

 length 12, diam. 3.3 mm. It is not closely related to any other species 

 I have seen, but groups wdth C. shikokuensis. 



{Group of C. validiuscula.) 

 Clausilia aratorum n. sp. PI. XIV, figs. 15, 16, 17, 18. 



Shell small, slender and thin, light brown and slightly transparent. 

 Surface glossy, coarsely sculptured with strong, regular, straight striae. 

 Apical whorls smooth, rather large. Whorls 9, somewhat convex, the 



