1908.] NATURAL SCIENCES OF PHILADELPHIA. 595 



close, engraved spiral lines, chiefly below the suture, wanting on the 

 first whorl, and becoming weak on the last whorl and the base. 

 Large specimens have just 5 whorls; these increase rather slowly to 

 the last which is very wide — ^wider than in related species. Seen from 

 above the spire is small, its diameter hardly 46 per cent, of the total 

 diameter of the shell. The last whorl is equally rounded at the 

 periphery. The aperture is broadly lunate. 

 Alt. 7, greater diam. 13.5, lesser 11.3 mm. 



The specimens described and figured are from Hangchow, Chekiang 

 Province, China; No. 95800 A. N. S. P., from No. 1476 of Mr. Hirase's 

 collection. 



P. rejecta is related to P. planula and P. planata of Heude, but 

 viewed from above the last whorl is wider than in either of these 

 species, both of which moreover are smaller. Dr. O. von Moellendorf 

 found rejecta in Lii-shan, near Kiukiang. P. Fuchs collected it in 

 southern Hunan and northern Guangdung, and Father Heude de- 

 scribed specimens from the former locality as H. mamillaris, a species 

 which von Moellendorff referred to rejecta as a synonym. The first 

 published record of rejecta, after the original reference, was by A. 

 Adams, who identified it from Tsushima {Annals and Magazine of 

 Natural History, 4th series, I, 1868, p. 467). Among difficult and 

 critical species an identification by Adams has slight value. Von 

 Martens, Reinhardt and Kobelt have repeated Adams' record, but 

 without further confirmation. I do not know the locality of the 

 specimen figured by Dr. Reinhardt. Kobelt has copied these figures. 

 On the whole, it seems hazardous to admit P. rejecta to the fauna of 

 Japan or Korea without better evidence than we now have. It will 

 probably prove to be pecuhar to China, especially in the district below 

 the mouth of the Yangtze, in An-hui and Chekiang Provinces. At 

 all events, the somewhat similar Petalochlamys known to us from 

 Tsushima is certainly a species distinct from P. rejecta. 



Petalochlamys subrejecta n. sp. 



Macrochlamys rejecta Pfr., Hirase, The Conch. Magazine, II, p.' 5 pi. 13 



fig. 13, not Helix rejecta 'Pir. ' ' 



Macrochlamys subrejecta Pils. and Hir.,Conch. Mag., II, p. 76 (no description) . 



Shell depressed, very narrowly vmabilicate, very thin and fragile, 

 glossy, of a pale brown tint, or very pale greenish-yellow. The sur- 

 face is weakly marked with growth-lines, and under the compound 

 microscope shows very fine, close, superficial spiral striae, wanting on 

 the first whorl, becoming weak on the last whorl. The spire is low- 

 conoidal, wide; its diameter, viewed from above, is 58 per cent, the 



