151 

 Family Fholadidce. 



ZlRF^A CRISPATA, L. 



Myacrispata, L. (1758). , 



Pholas cn'spata, L. (1767). 



Zirfcea crispata, Gray (1851). 



Zirphma crispata (Gray) Leach (1852) ; and of subsequent authors. 



Widely distributed throughout the north Atlantic, but rare in the Gulf 

 of St. Lawrence and seas of the Maritime Provinces. So far as known, its 

 bathymetrical range, on the North American side of the Atlantic, is from 

 low-water mark to 70 fathoms. Stiiupson says that it occurs very rarely at 

 Grand Manan, and Verrill that he has dredged it in the Bay of Fundy, in 

 8 to 70 fathoms, hard clay. Willis states that he has received large 

 specimens from Sable Island ; the writer has dredged it on the Orphan 

 Bank ; and Bell records it as occurring at Bic, Rimouski, and near the Trent. 



Dall says that "the Zirfceairom the north-west coast of America, referred 

 by Carpenter to Z. crispata, is a distinct though allied species, called Z. 

 Gabbi by Tryon, and found fossil in the Pleistocene of California, as well as 

 living, there and northward."* 



Xylophaga DORSALis, Turton. 



In waterlogged wood, Gaspe Bay, dredged by Sir J. W. Dawson in 1869, 

 and identiiied with this species by the writer in 1872. 



Family Teredinidce. 



Teredo navalis, L. 



Marine slip timbers at Pictou, N.S.; St. John, N.B., in part of a ship's 

 hull (Whiteaves). 



Teredo dilatata, Stimpson. 



" Very large specimens have been received from Sable Island taken from 

 wreck timber " (Willis). The species is said to be very closely allied to T 

 megotara, Hanley. 



Transactions of the Wagner Free Institute of Science of Philadelphia, vol. in., p. 818. 



