1901.] NATURAL SCIENCES OF PHILADKLIMI 1 A. 651 



Var. KIIENSIS Pils. Kurozu, Nachi and Tomisato, Prov. Kii 



(Hirase). 5 



Group of C. ptychochila. 



C. BERNARDII Pfr. [Siam ? Riukiu Islands ?] 



C. CRENILABIUM Pils. Prov. Kunchan, Okinawa (Hirase). 



C. PTYCHOCHILA Bttg. [China ? Riukiu Islands ?] 



C. EXCELLENS Pfr. ( C. prwclam Old. preoc.). Okinawa 



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



Group of C. Pinto. 



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

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

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



Group of C. munus. 

 C. MUNus_Pils. Oshima, in the Riukiu Islands (Hirase). 



Section ZAPTYX Pilsbry. 



C. HIRASEI Pils. Kagoshima and Sakura Island, Satsuma 



(Hirase). 

 Var. KIKAIENSIS PiJs. Kikaigashima, Osumi (Hirase, Nos. 557, 



5576X 



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

 C. HACHIJOEXSIS Pils. Hachijo Island, Izu. 



Section TYKANNOPH^EDUSA Pilsbry. 

 Group of C. mikado. 



C. MIKADO Pils. (C. omiensis Mlldff. ). Ibuki, Omi, and Akas- 



aku, Miuo (Hirase). 

 C. IOTAPTYX Pils. Ibuki and Ryozen, 6 Omi (Hirase). 



Var. CLAVA Pils. Senzan, Awaji; Ikoma, Kii (Hirase). 

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



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

 Whorls 8J-10. Length 16-17, diam. 4 mm. 



6 Specimens of C. iotaptyxirow Ryozen, Omi, have 12 to 13 whorls, but 

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

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



