18 THE NAUTILUS. 



margin. This species was found in Stafford's Pond, Tiverton, R. I., 

 by Mr. John Ford and the writer while on a trip to the south- 

 eastern part of R. I. in search of some of the rare land shells de- 

 scribed by Mr. John H. Thompson, of New Bedford, Mass. I am 

 sorry to state that our search for these rare shells was not rewarded 

 by a single specimen. 



216. Sphaerium deformis H. F. Carpenter. 



Shell transversely oblong, elongated, both sides of nearly the same 

 length ; anterior margin curved ; posterior margin abrupt, forming 

 an angle with the hinge margin ; basal margin having a twist to one 

 side, as though some one had given it a pinch in the middle, squeez- 

 ing it together and at the same time twisting it downwards; beaks 

 large, inclined towards the anterior ; valves thin, smooth, of a dirty 

 brown color. 



This species was found in Tiogue Reservoir, in the town of Coven- 

 try, R. I., by Mr. Richard Allen, who presented them to the writer. 

 This species, with the somewhat doubtful Cyprina islandica, which 

 (it is claimed) has been found in Rhode Island, brings up the num- 

 ber of species to 217, as per catalogue published by me in 1889, 

 copies of which may be had free by addressing H. F. Carpenter, 58 

 Page St., Providence, R. I. 



A NEW GENUS OF EOCENE EULIMIDAE 



BY THOS. L. CASEY. 



As far as available literature discloses, the following genus seems 

 to represent a new and very interesting type of Eulimidae, which 

 may be outlined by the following characters: 



Ptereulima n. gen. 



Conical, devoid of sculpture, finely attenuate, wilh simple direct 

 nucleus, umbilicated, the columella as usual without folds; anterior 

 whorls having a large flattened process or wing at each side. 



This genus appears to be more closely allied to the Chinese 

 Hoplopteron of Fischer than any other known at present, but the 

 latter is imperforate and has the apex obtuse. 



Ptereulima elegans n. sp. Almost evenly conical, the surface 



