MOLLUSC A OF QBE AT YARMOUTH. . 185 



T. fabula, Gron — (H.). </ , . 



Donax vittatus, Da Costa. — (H.). I have received a few from the 

 shrimpers. 



Mactra stultorum, Linn. Radiated Trough Shell. — C. In Decem- 

 ber, 1899, after a strong wind and a scouring tide, bushels of this 

 species were washed up on Gorieston beach. Undoubtedly this 

 mollusc offers great attractions for the flocks of Scoters which occa- 

 sionally frequent this coast all the winter. I have had examples from 

 the shrimp-nets, and in the winter of 1901 found some large valves 

 near Gorieston Pier. 



M. solicla, Linn., var. elliptica. — (H.). 



Scrobicularia nitida, Mull. — F. C. Harbour mouth. 



S. alba, Wood. — " Few, harbour mouth " (B.). 



S. piperata, Bellon. — C. Abundant on Breydon. The empty 

 valves, protruding from the mud in all directions, give the flats in 

 certain lights a very remarkable appearance. Living examples are 

 found a few inches below the surface. 



Solen siliqua, Linn. — 0.' After gales a few empty valves are thrown 

 up on Gaister beach. Some years ago several hundreds were cast up 

 alive ; these drew together a great congregation of Gulls of various 

 species, delighted to find so abundant and palatable a supply of food. 

 Quite a sprinkling on beach, April, 1902. 



Corbula gibba, Olivi. — (H.). 



My a armaria, Linn. "Clam." — C. Abundant on Breydon, but 

 is never eaten, nor even used locally as bait. Mr. Southwell tells me 

 it "is both eaten and used for bait by the Lynn people." 



M. truncata, Linn. — " Young only found. In drift " (B.). I met 

 with a fine example, April 8th, 1902. 



Saxicava rugosa, Linn. — 0. (B.). 



8. var. arctica, Linn. — (H.). 



Pholas dactylus, Linn. — 0. "In pieces of chalk" (B.). I have 

 occasionally found this species in lumps of chalk that undoubtedly were 

 originally used as ballast in vessels probably wrecked. 



P. Candida, Linn. — " Few washed up on Gorieston beach '' 

 (B.), (H.). 



Teredo navalis, Linn. Ship-worm. — C. Was formerly exceed- 

 ingly destructive to the Gorieston piles, and to those of the piers. 

 The old laborious process of covering the lower parts of piling with 

 flat-headed nails has been superseded by saturation of the timbers 

 with creosote. 



