1901.] NATURAL SCIENCES OF PHILADELPHIA. 549 



rather long and lies backward in the suture; the whorl is then 

 rather strongly constricted and almost smooth, the riblets reappear- 

 ing behind the lip. Aperture oblique, circular, peristome narrowly 

 reflexed and doubled. Operculum thin, reddish-corneous, smooth 

 externally. 



Alt. 2.3, diam. 3.7 mm. 



Kagoshima, Satsuma, Kiusiu (Mr. Y. Hirase, No. 704). 



The " neck" is more constricted than in A. melanopoma, and 

 the operculum is thin. It differs in sculpture from the other 

 Japanese species of Alycwus, which are all a good deal alike in 

 form. 



Cyclophorus turgidus var. angulatus nov. 



Substance of the shell roseate ; thick and strong, distinctly angu- 

 lar or cariiiated at the periphery ; interior orange or orange-red. 

 Whorls 5. 



Alt. 23J, diam. 29 mm. 



Alt. 16, diam. 20 mm. 



Loo Choo (Mr. Y. Hirase, No. 713). 



