1908.] NATURAL SCIENCES OF PHILADELPHIA. 39 



semicircular in shape, calcareous, thick, white, with a dark nuclear 

 dot nearer the outer border; around this it has concentric growth-lines. 

 The inner face is concave. Near the lower third a stout rib arises 

 about the middle of the width, running to the columellar border 

 where it projects as a short point. 



Hangchow, province Che-kiang, China. Types No. 94,745 A. N. S. 

 P., from No. 1,477 of Mr. Hirase's collection. 



This species is very similar to G. sinensis (Hde.) in characters of the 

 shell, but it differs in the operculum, which is figured as with sub- 

 central nucleus in G. sinensis, while in G. heudei the nucleus is near the 

 outer border. We have no reason to doubt the accuracy of Heude's 

 figure. It was drawn by Rathouis, whose faithful drawings have prob- 

 ably never been surpassed. Unfortunately Pere Heude, who described 

 G. sinensis as a Realia, did not describe the operculum, merely saying 

 that "I'opercule est celui du genre." 



Some specimens from Changyang, received as G. sinensis, are much 

 smaller than Pere Heude's type. They have a dark, subcentral 

 nuclear dot. 



G. heudei occurred at Hangchow with the much smaller G. bach- 

 manni Gredl. 



HKLICID^. 

 Eulota laeva P. and H., n. sp. 



The shell is sinistral, depressed-globose with conic spire, narrowly 

 half-covered umbilicate, thin, light corneous-yellow. Surface glossy, 

 smooth to the eye, but under a lens it is seen to have very weak, faint 

 growth-lines, the last two whorls densely, minutely granular, the granu- 



front and dorsal \'iew.s. 



lation weak on the upper surface, more distinct on the base ; there are 

 also some weak traces of a few coarse, impressed spirals on the last 

 whorl. The spire is conic with slightly convex outhnes and obtuse 

 apex. Whorls 5^, slowly increasing convex, the last descending a little 



