1908.] 



NATURAL SCIENCES OF PHILADELPHIA. 



37 



NEW LAND SHELLS OF THE CHINESE EMPIRE-I. 



BY H. A. PILSBRY AND Y. HIRASE. 



The following species were collected by Mr. Nakada in the course of 

 several months' work, chiefly in the north. A more ample report 

 will be published later. Working chiefly in the densely populated 

 northeastern provinces and not far from the coast, the number of 

 species taken was naturally not great, though some, such as Vallonia 

 patens Reinh., Eulota? miinieriana Cr. & Deb., etc., are forms hitherto 

 but little known. Around Soochow and Hangchow a fauna richer in 

 Clausilice, Helices and Cydophoridce was encountered, most of the 

 species in this region being among those described by Pere Heude and 

 earlier naturalists. 



DIPLOMMATINIDiE. 



Diplommatina hangchowensis n. sp. Fig. 1. 



The shell is short, cylindric, the summit shortly conic, base rounded ; 



corneous or pale brownish, somewhat translucent, the upper part 

 whitish or pale red. Whorls 5^, very convex. 

 The first whorl is smooth; following whorls are 

 very finely and delicately rib-striate ; on the 

 penultimate whorl the ribs are much weaker, 

 and the last whorl is smooth. In back view the 

 penultimate whorl is largest, the last whorl 

 much smaller and quite glossy, ascending a 

 little near its end, and constricted in front, 

 above the columella. A short palatal plica 

 shows through, just left of the parietal callus. 

 The aperture is nearly circular. The peristome 

 is expanded and thickened, with a flat face and 

 inconspicuous inner rim; at the base of the 

 columella it is very indistinctly angular; it is 



interrupted above, the margins joined by a thin parietal callus, with 



thin adnate edge. Columellar lamella well developed. 

 Length 2.4, diam. 1.3 mm., alt. of aperture 0.95 mm. 

 Hangchow, province of Che-kiang, China. Types No. 94,748 A. N. 



S. P., from No. 1,479a of Mr. Hirase's collection. 



Fig. 1. — Diplonvnatina 



hangchoivensis . 



