COCHLICOPA. 325 



At Shukunobe, Ojima, Yesso, the shells are very large, 

 length 8.4, diam. 3, aperture 3 mm., with 614 whorls. The 

 lip-rim is thin and narrow. The shape is oblong-conic, not 

 cylindric like the shells from Sado. These specimens have 

 the characters of C. lubrica nitens of Europe. 



A series taken at Aikawa, Sado Island, Japan, by Mr. 

 Hirase, one of them drawn on pi. 48, fig. 30, is perhaps refer- 

 able to C. davidis. The shell is cylindric-oblong, either chest- 

 nut or of a beautiful, transparent greenish corneous tint. 

 The outer lip has only a thin and very narrow internal rim 

 (pi. 48, fig. 30). 



Length 8.5, diam. 3, aperture 3 mm. ; whorls 6%. 



Length 8, diam. 2.9 mm. 



These shells are more cylindric, less conic than the large 

 form from Yesso, otherwise being much like it. Whether these 

 large Japanese shells are an independent race, or are geneti- 

 cally connected with nitens 'Kok/ Gall., or with davidis Anc., 

 is a question we have not at present the means of solving. 



That a form of the high country of central Asia should 

 occur also on an islet in the Japan Sea seems intrinsically 

 unlikely ; yet I can find no ground for separating the Japanese 

 form. It is not unlikely that the forms from both regions 

 would more justly be ranked as subspecies of C. lubrica. 



2. C. DAVIDIS Ancey. 



"This species differs from Zua lubrica of tfur country by 

 its larger size, less swollen, more parallel and more length- 

 ened shape, and especially by the fold and sinuosity of the 

 columella being more pronounced. It has 6 whorls. Length 

 8, diam. 2.75 mm." (Ancey). 



China: Prov. Shensi, at Ying-dshia-pu (David, type loc.) ; 

 Tshung-pu-sy, Feng-hsien (Obrutschew) ; Prov. Hu-bei at 

 Badung (Fuchs) ; Prov. Gan-su at San-tshan and Tshing- 

 yuan (Mlldff.)- 



Zua davidis ANCEY, Le Naturaliste 1882, p. 45 [not seen 

 by H. P.] ; II Nat. Siciliano ii, 1883, p. 269, no. 55. Cionella 

 davidis GREDLER, Malak. Bl. n. F. ix, p. 141. Zua davidia 

 STURANY, Denkschr. k. Akad. der Wissenschaften, vol. 70, 



