HEY : YORKSHIRE MARINE SHELLS. 



27 



Pholas crispata L. 



An abundant species on the Yorkshire coast, which has 

 flourished here at least since the times of the 'Bridhngton 

 Crag.' In the Lias Scars at Redcar. At Scarborough, both 

 on the North shore in company with P. cajidida, and also on 

 the South shore, in the gray limestone — very fine in the last- 

 named locality. Also in the chalk near Danes' Dike. 



SAXJCA VIDAi. 



Saxicava Xorvegica Spengler. 



Occasionally brought in by the deepwater fishing boats. A 

 Mr. Ferguson thus met with two specimens at Redcar. The 

 Rev. F. Hayden, of Skelton, obtained a specimen from a Scar- 

 borough fisherman. Mr. Bean used to get it occasionally. 



Saxicava riigosa L. 



Abundant along the coast, both in burrows and attached 

 by a byssus to the roots of Lauiinaria dtgitata. Danes' Dike. 

 Scarborough. Redcar, where it is occasionally washed up in 

 vast numbers. The large water-worn lumps of chalk flung up 

 by the sea under Flamborough CHffs are often full of old speci- 

 mens, which may be almost termed semifossilized. 



Mya arenaria L. 



Occurs in the mudflats which border the estuary of the 

 Tees. The Redcar fishermen occasionally use it for bait, but 

 it is not abundant. I have once taken it alive in Bridlington 

 Harbour. 

 Mya truncata L. 



This species also occurs in the Tees estuary, and after certain 

 winds is sometimes cast up in considerable numbers on Coatham 

 Sands. 



PANDORID^. 



Lyonsia Norvegica Chemn. 



Has been taken at Scarborough. 



ANA TINID^. 



Cochlodesma prsetenue Pult. 



I have only once met with this scarce shell on the Yorkshire 

 coast, viz., at Redcar, where I found a perfect specimen on the 

 beach after a violent storm. It has been dredged at Scarborough. 



SOLENIDAt. 



Solen pellucidus Penn. 



On the sandy beaches of Coatham and Bridlington, but far 

 from common. Also at Scarborough. 



Sept. 1884. 



