MARSHALL: ADDITIONS TO " BRITISH CONCHOLOGY." 201 



one from Loch Fyne, and I suspect that these are specimens of var. 

 perforans which have been washed out of their rocky habitat. 



T. decussatus L. — I have not met with this species in the 

 Channel Islands save a small specimen at Herm, and Mr. Tomlin 

 has an adult specimen from the same island ; but I suspect that 

 Gwyn Jeffreys' record, " on the shores of our southern and western 

 counties,'" should apply to the strictly British coasts. Mr. Marquand 

 gives Alderney, and cites "Guernsey and Herm (Tomlin),"^ but in the 

 former instance I have seen the specimens, and they prove to be 

 large, coarse examples of T. pullastra. There is a tablet of six 

 specimens in the Guernsey Museum, but they are from the British 

 coast proper. There is also a single specimen in the Duprey collec- 

 tion in the Jersey Museum, but without locality, and in his paper Mr. 

 Duprey cites the name only. 



Gastrana fragilis L. — Milford Haven (Span and Vaughan) ! 



Tellina balaustina L. — Straits of Korea lof. (H.M.S. 'Sylvia') ! 



T. balthica L. — Very large from Eastbourne, exceeding i] in. 



T. donacina L.— "A fact in connection with this species, which I 

 believe has not been previously recorded, is the presence of a small 

 internal ligament. This is especially noticeable in young shells, and 

 is placed obliquely behind the cardinal teeth. Several other species 

 also possess this feature,"" 



Psammobia tellinella var. gracilis Jeff. — Gairloch 2 2f 

 P. COStulata Turt. — Alderney (Marquand) ! 



P. ferroensis var. pallida Cockerell (Zoologist, 1887, p. 1)5). — 

 Tenby (Span)! 



Donax vittatus Da Cos. — It is surprising that this very common 

 species has not indisputably been met with in the Channel or Scilly 

 Islands, although Mr. Marquand records a " valve " from Alderney 

 (which, by the way, was a perfect specimen), and cites " Herm 

 (Tomlin).'*^ It is abundant on the coasts of Normandy and Brittany 

 adjacent to Jersey, and specimens may often be met with in the Jersey 

 fish market, brought with other shellfish from St. Brieuc, St. Malo, 

 Granville, etc. These specimens are larger and broader than our 

 type, are not unlike var. tiirgida Jeff, except in being flatter, and are 

 similar to a form I have received from the Mediterranean as var. 

 prolongata. 



var. turgida Jeff. — Aberdeen beach, cast ashore (Simpson)! 



I Biit. Conch., vol. ii., p. 360. 



?. M.ii-ine Shells of Guernsey, etc., Trans. Guern. Soc, Nat. Sci., igoi, p. 6 (sep. copy). 



3 E. A. Smith, ' Challenger ' Pelecypoda, p. 106. 



4 Marine Shells of Guernsey, etc.. Trans. Guern. Soc. Nat. Sci., igoijp. 6 (.sep. copy). 



