724 PROCEEDINGS OF THE ACADEMY OF [Oct., 



Alt. 10, diam. 14, aperture 6.9 x 6.5 mm., umbilicus 3.1 mm. wide. 

 Alt. 9.9, diam. 14.2, aperture 6.9 x 6.5 mm., umbilicus 3.2 mm. wide. 



Cyclotus swinhoei H. Ad. 



P. Z. S., 1866, p. 318, pi. 33, fig. 9. 



Takao (Swinhoe). Sculptured with raised spiral threads. 



Alt. 7, diam. 11 mm. 

 Cyclotus swinhoei depressus n. subsp. 



Shell similar to C. sivinJioci but more depressed. 



Alt. 6, diam. 11 mm., umbilicus 2.9 mm. wide; diam. and alt. aperture 

 with peristome 4.9 mm. 



Giiran. Type Xo. 89,915 A. X. S. Phila., from Xo. 1,372 of Mr. 

 Hirase's collection. 



Cyclotus minutus H. Ad. 



P. Z. S., 1866, p. 318, pi. 33, fig. 9. Schm. and Bttg.. Xachrbl., 1891, p. 



192 ?? 



Takao (Swinhoe); Takao and Bagsa (Schmacker). 



The typical form was not found by Mr. Okura. Prof. Steere collected 



a large series some years ago, part of which are in our collections. 



Cyclotus minutus concentratus n. subsp. 



Shell reddish-brown or pale olive-green with a brown spire, 

 closely sculptured with fine spiral threads (closer than in C. minutus) 

 on a glossy ground, except for a band below the suture (both on the 

 spire and within the umbilicus), which is covered with narrow whitish 

 cuticular rays. Whorls 3|, tubular, the last barely in contact at the 

 mouth. Umbilicus much smaller than the aperture, and smaller than 

 in C. minutus. Aperture but slightly oblique, circular, the peristome a 

 little expanded, obtuse. Operculum concave, with dark gray central 

 spot and obliquely striate whorls. 



Alt. 5.3, diam. 7.9 mm.; width of umbilicus 2 mm. 



Chikutozaki, Taiwan. Types Xo. 89,897 A. X. S. Phila., from Xo. 

 1,426 of Mr. Hirase's collection. Six specimens taken. 

 Cyathopoma taiwanicum n. sp. 



Shell umbilicate, conic, corneous, somewhat translucent. Whorls 

 3^, the first smooth, dark corneous, the rest spirally lirate, very convex, 

 the penultimate with four or five thread-like spirals. Last whorl tubu- 

 lar, the threads weaker on its later part, much stronger around and in 

 the umbilicus. Aperture circular, the peristome thin, simple, barely in 

 contact with the preceding whorl. Operculum lodged at the aperture, 

 white, concave externally, usually with a dark dot at the center. 



Alt. 1.5, diam. 2 mm. 



