332 



PROCEEDINGS OF THE ACADEMY OF 



[1888. 



vermilion color when alive, but brown when dead, and masses of it 

 in the latter condition are often found on the ocean beach. It is a 

 silicious sponge and does not prey on the shells of mollusks. 



From an oyster bed we took up some young oysters, an inch to 

 two inches long, with the shell perforated by the *' drill," Urosalpinx 

 cinerea. The perforation, made in the vicinity of the adductor mus- 

 cle, about admits an ordinary bristle. An oyster catcher, James R. 

 Gale informed us that the " drill " was introduced into the locality, 

 with spat brought from the coast of Virginia. With the Urosal- 

 pinx we took another snail, Anachis similis, which Mr. Gale assured 

 us was more destructive, as a borer, to young oysters than the form- 

 er. Another snail which we took, the Eupleura caudata, Mr. Gale 

 says has the same habit. 



Attached to oysters were also found a great profusion of the poly- 

 zoon Vesicularia dicJiotoma. 



Of the mollusca of the vicinity of Beach Haven I observed the 

 following : 



Gasterpoda. 



Ilijanassa obsoleta. 

 Melampus bidentatus. 

 Fulgur carica. 

 Fulgur canaliculata. 

 Natica heros. 

 Natica duplicata. 

 Urosalpinx cinerea. 

 Eupleura caudata. 

 Anachis similis. 

 Bittium nigrum. 

 Crep idula Jorn icata. 

 Grepidula conve.va. 

 Crepidula plana. 



Exceedingly abundant. 

 Exceedingly abundant. 



Lamellibranchiata. 



Mactru: solidissima. 

 Donax fossor. 

 Venus mercenaria. 

 Mya arenaria. 

 Solen americanus. 

 Tagellus gibbus. 

 Ceronia deaurata. 

 Cochlodesma, carum. 

 Thracia leana. 

 Cyclocardia borealis. 

 Astarte nndata. 

 Astarte castanea. 

 Petricola pholadiformis. 

 Pholas truncata. 

 Phohis eostata. 

 Cyclas dentata. 



Exceedingly abundant. 

 Exceedingly abundant. 

 Exceedingly abundant. 

 Abundant. 

 Common. 



One dead specimen. 



One dead specimen. 

 One dead specimen. 



