630 PROCEEDINGS OF THE ACADEMY OF [Sept., 



largillierti of Okinawa, that species having the umbiHcus far smaller, 

 no noticeable spiral striation, and a conic spire. 

 Ganesella myomphala okinoshimana n. subsp. 



Shell imperforate, smaller than G. myomphala, with a much wider 

 (1.5 to 2 mm.) peripheral dark band. Whorls 6^ to 6^. 



Alt. 23.5, diam. 31 mm. 



Alt. 18.5, diam. 28 mm. 



Okinoshima, Tosa. Types No. 80,822 and 87,644, A. N. S. P., from 

 No. 583 of Mr. Hirase's collection. 



Like G. m. rninor Gude, of Awaji, this is a small insular form, but 

 doubtless independently evolved. 

 Ganesella selasia textilis n. subsp. 



Similar to G. selasia in the somewhat triangular aperture and rather 

 large umbilicus, but differing in the following respects: The spire is 

 lower, more convexly conoidal; the surface is very minutely, obso- 

 letely and irregularly granulose in places, and there are irregular spiral 

 lines on the base, especially near the umbilicus; just above the periph- 

 ery there is a very faint brown band ; and, finally, the lip is white and 

 thicker than in selasia. Whorls about 5+, the last slightl}^ deflexed in 

 front and noticeably contracted behind the peristome. 



Alt. 12.5, diam. 17 mm. 



Alt. 12.7, diam. 16.5 mm. 



Arakura, Tosa. Types No. 84,778, A. N. S. P., from No. 1,035 of 

 Mr. Hirase's collection. 

 Ganesella selasia zonata n. subsp. 



The shell is much more depressed than G. selasia or G. s. textilis, 

 openly umbilicate, with low, convexly conoid spire and depressed last 

 whorl, which is almost angular in front. Surface glossy, very minutely 

 and densely but subobsoletely granulose. Whorls about 5^, the last 

 wide, slightly deflexed in front, and usually somewhat contracted 

 behind the peristome. The aperture is sul^triangular, the lip white and 

 somewhat thickened. The shell is light brown or corneous-brown, 

 with a narrow brown band immediately above the periphery, and 

 ascending the spire just above the suture. 



Alt. 14, diam. 19.6 mm. 



Alt. 13, diam. 18 mm. 



Amasaki, Tosa. Types No. 85,728. A. N. S. P., from No. 1,107 of 

 Mr. Hirase's collection. 



The low spire gives this subspecies an appearance very different from 

 G. selasia. It is much more closely related to G. s. textilis; and it has 

 affinity to G. wiegmanniana, also a Shikoku species; but both zonata 



