1901.] NATURAL SCIENCES OF PHILADELPHIA. 651 



Var. KIIENSI8 Pils. Kurozu, Naclii and Tomisato, Prov. Kii 

 (Hirase).^ 



Grovp of C. ptychochi/a. 



C. BERNARDii Pfr. [Siaui ? liiukiu Islands ?] 

 0. CRENiLABiUM Pils. Prov. Kunclian, Okinawa (Hirase). 

 C. PTYCHOCHiLA Bttg. [China ? Kiukiu Islands ?] 

 C. EXCELLENS Pfr. ( ( '. pivrc/ara Gld. preoc. ). Okinawa 

 (U. S. N. P. Exp.). 



Group of C. Pinto. 



C. Pinto Pils. Tane-ga-shima, Osumi (Hirase). 

 C. PTYCHOCYMA Pils. Taue-ga-sliima, Osumi (^Hirase). 

 Var. YAKLTSHiM.E Pils. Yaku-shima, Osumi (Hirase). 



Group of C. munus. 

 C. MUNUS Pils. Oshima, in the Piukiu Islands (Hirase). 



Section ZAPTYX Pilsbiy. 



C. HiRASEi Pils, Kagoshima and Sakura Island, Satsuma 



(Hirase). 

 Var. KiKAiENSisPils. Kikaigashinia, Osumi (Hirase, Nos, 557, 



5576\ 

 C. HYPEROPTYx Pils. Okinawa; Yaeyama (Hirase). 

 C. HACHiJOENSis Pils. Hachijo Island, Izu. 



Section TYEAXNOPH.EDUSA Pilsbry. 



Group of C. mikado. 



C. MIKADO Pils. (C omiemis Mlldff. ). Ibuki, Onii, and Akas- 



aku, Mino (Hirase). 

 C. lOTAPTYX Pils. Ibuki and Ryozen," Omi (Hirase). 



Var. CLAVA Pils. Senzan, A^yaii; Ikoma, Kii (Hii-ase). 

 C. ORTHATRACTA Pils. Akasaka, Mino (Hirase). 



^Smaller than platydera ; more swollen below and more attenuate above- 

 Whorls 8i-10. Lenfith 16-17, diani. 4i mm. 



"Specimens of C. iotapti/x irom liyozen, Omi, have 12 to 13 whorls, but 

 otherwise are like the types from Ibuki, Omi. The shells from Ikoma, Kii, 

 are somewhat intermediate between iotaptyx and clava, but nearer the latter. 



