1904.] NATURAL SCIENCES OF PHILADELPHIA. 617 



and earlier whorls. Whorls 4^, the last tubular, bearing a series of 

 flat paddle-shaped cuticular processes at the shoulder and another 

 at the periphery. Aperture circular, the peristome simple, interrupted 

 a short distance where it touches the previous whorl. 



Alt. 3.75, diam. 4 mm. 



Tokunoshima, Osumi. Types No. 87,512, A. X. 8. P., from No. 1,206 

 of Mr. Hirase's collection. 



This form is a little larger than J . barbata Old. of Oshima, Osumi, 

 and has not the two more conspicuous spiral ridges described for that 

 species. 



The flat spatulate cuticular processes upon the last whorl are very 

 readily lost, and probably never perfectly preserved in adult shells. 



Alycseus purus n. sp. 



Shell much depressed, oblong in contour, Avhite, the first whorl rufous 

 tinted. Whorls 3 J, convex, those of the spire nearly smooth, the last 

 whorl very closely, finely and delicately rib-striate as far as the neck, 

 which is decidedly constricted and smooth, the whorl enlarging and 

 striate again beyond it. The last half of the last whorl is much en- 

 larged and straightened, making the umbilicus oblong. The sutural 

 tube is long. The aperture is oblique, circular; the peristome is thin, 

 with a small delicate collar close to the edge. 



Alt. 1.7, diam. 3 mm. 



Tokunoshima, Osumi. Types No. 87,683, A. N. S. P., from No. 

 1,219 of Mr. Hirase's collection. 



The sculpture is much finer than in ^1. tancgashimcc, and the neck is 

 more constricted. It is more depressed than most Japanese species^ 

 and it is more oblong in outline, viewed from above. 



Alycaeus tokunoshimanus n. sp. 



Shell depressed, light red. Whorls 3^, the first smooth and glossy,, 

 the following ones nearly smooth to the last whorl, which is very densely 

 and finely rib-striate, the strise weak or wanting on the neck. The 

 last half of the last whorl is much enlarged and somewhat straightened,, 

 moderately constricted at the neck, enlarged beyond it and deeply 

 deflexed. The aperture is oblique, circular; the peristome continuous^ 

 thickened outside and bevelled to the edge. 



Alt. 2.3, diam. 3.7 mm. 



Tokuno.shima, Osumi. Types No. 87,505, A. N. S. P., from No. 931a 

 of Mr. Hirase's collection. 



This shell is sculptured much as in .4. purus, and is nearly as de- 

 pressed as that species, but it is larger, colored, less oblong in peripheral 

 40 



