328 PROCEEDINGS OF THE ACADEMY OF [1892. 



ovoid shape of these animals, claiming that this was an advantage 

 in enabling them to escape from some of their enemies, the birds, 

 for example, finding the same difficulty in picking them up as is 

 encounted in using the forceps for the same purpose on the specimens. 



October 18. 

 Mr. Chas. p. Perot in the chair. 

 Forty-seven persons present. 



A New Marine Gasteropod from Neiv Jersey. — Mr. H. A. Pilsbry 

 exhibited a series of specimens of a large species of Chrysodomus, 

 belonging to the subgenus iSipho, which he had received from Messrs 

 Witmer Stone, Chas. LeRoy Wheeler and John Ford. He stated 

 that the specimens were cast upon the shore during severe gales from 

 the south east,- and were evidently derived from a submarine 

 stratum which was disturbed and broken up at those times. Asso- 

 ciated with the Chrysodomus were examples of Buccinum undatum, 

 TJrosalp'inx cinereus of extraordinary dimensions, and Chrysodomus 

 (Sipho) Stimjysotiii, the latter being well developed and typical in 

 sculpture. The age of the deposit cannot definitely be settled at 

 present, but the evidence at hand indicates that it is post-pliocene. 



The following descrijDtion of the new species was offered : 



Chrysodomus (Sipho) Stonei (PL XIV, figs. 1, 2, 3,). Shell 

 obese-fusiform, rather thick and solid, with strongly convex whorls 

 separated by deep sutures. Sculpture consisting of strong spiral 

 cords, equal on young specimens and on the spires of adults, but 

 which alternate with smaller intermediate cords on the body-whorl 

 in full grown specimens. A young shell, therefore, has about 20, an 

 adult 40 spirals upon the body-whorl. The aperture is oval ; the 

 canal is strongly curved to the left and backward. 



Length 72, greatest diam. 45 mm.; length of aperture and canal 

 51mm. The largest individual measures, length 100, breadth 64, 

 length of aperture 78 mm. Both of these, as well as all specimens 

 seen, have lost several of the earlier whorls ; so the length of a 

 perfect individual would be proportionately greater. 



The more prominent features of this species are the swollen form, 

 deep sutures, the strong spiral sculpture, and the strongly recurved 

 canal. 



The localities from which specimens have been obtained are as 

 follows: Point Pleasant, N. J. (Witmer Stone) ; Sea Isle City, N. 

 J. (John Ford, Oct., 1892) ; Cape May, N. J. (C. LeRoy Wheeler, 

 1891.) 



Prof. A. E. Verrill of Yale College very kindly compared spec- 

 imens of this species with the collection under his charge (a collec- 

 tion vastly richer than any other in mollusks of the north-west 

 Atlantic.) He writes as follows : 



