628 PROCEEDINGS OF THE ACADEMY OF [Dec., 



Clausilium (PI. XXXV, fig. 13) remarkably straight, rounded 

 at the apex, abruptly bent near the filament, and very deeply ex- 

 cised on the columellar side of the latter. 



Tane-ga-shima, Osumi, in the northeastern group of the Kiukiu 

 Islands. Types No. 82,553 Coll. A. N. S. P., from No. 663 of 

 Mr. Hirase's collection. 



A smaller^species than C. ptychocyma, with the last whorl plain 

 and normal, not strongly sculptured, as C. ptychocyma is. The 

 solid, smoothish shell, short spiral and columellar lamellae, and 

 peculiarly flat clausilium are the same in both species. 



At the time I wrote a preliminary account of the Tane-ga-shima 

 and Yaku-shima snails these points of relationship were not 

 appreciated, and I took a wrong view of the affinities of C. pinta. 

 Clausilia ptychocyma Pilsbry. PI. XXXV, figs. 7, 8, 9. 



Pilsbry, these Proceedings for 1901, Vol. LIII, p. 501 (October 2). 



Shell obesely fusiform, rather acutely tapering above, buff or in 

 part pale reddish, extremely solid and thick, weakly striate, 

 almost smooth. Whorls 9, the latter part of the last whorl having 

 a strong wave or crest, accompanied by several smaller but strong 

 wrinkles, behind and parallel to tne outer lip. Aperture small, 

 squarish-ovate, the peristome slightly expanded, thick, hardly 

 free above. Superior lamella low and small but stout, separated 

 from the spiral lamella, which runs inward barely to the ventral 

 side. Inferior lamella very deeply receding, strong and obliquely 

 ascending inside, penetrating as far as the spiral lamella. Sub- 

 columellar lamella immersed, its lower end visible in an oblique 

 view in the aperture, sometimes very weakly emerging. Principal 

 plica rather short, visible deep in the throat and extending shortly 

 past the lunella. Lunella lateral, weak, straight above, curving 

 inward below and joining or contiguous to a very short, nodule- 

 like lower palatal plica. 



Length 11, diam. 3 mm. 



Clausilium (PI. XXXV, fig. 10) parallel-sided, remarkably 

 straight in profile, tapering on both sides and slightly acuminate 

 below, excised on the columellar side of the filament. 



Tane-ga-shima, Osumi. Types No. 81,932, Coll. A. N. S. P., 

 from No. 664a of Mr Hirase's collection. 



An exceedingly solid little Clausilia, quite unlike C. tanega- 

 shimce in its immersed or nearly immersed subcolumellar lamella, 



