558 H. H. Soworth — Traces of a Great Post-Olacial Flood. 



says : " A. compressa and particularly the variety striata is exten- 

 sively distributed throughout the North Atlantic from Spitzbergen 

 and the White Sea to the Cattegat, as well as on the north-eastern 

 coasts of America"^ (British Conchology, vol. ii. p. 316). 



II. Leda rostrata. — Forbes gives this as a synonym of the Niicula 

 ohlonga of Brown (ojj. cit. p. 419), which Jeffreys again says is the 

 same as the Zeda pernula of Miiller, and tells us he dredged a young 

 live specimen and a small single valve of the shell in 80 fathoms 

 off the Shetland coast ; single valves not living have also occurred in 

 Loch Duich, in Eoss-shire, and St. Magnus Bay, on the west coast of 

 Shetland (Jeffreys, op. cit. vol. ii. p. 158, and vol. v. pp. 173 and 174). 



III. Leda hjperborea. — Is not referred to in Forbes's detailed list 

 of glacial shells, nor do I know what species is meant by it. 



IV. Tellina Grcenlandioe. — Sars deems it a mere variety of Tellina 

 haltJiica, whose wide distribution over the seas of Northern Europe 

 is well known. The variety Grcenlandica is now found living in the 

 Gulf of St. Lawrence (Forbes, op. cit. p. 411). 



V. Tellina calcaria. — Jeffreys says this shell is found on the 

 Danish coasts of the Baltic, and northward as far as Spitzbergen, as 

 well as on the shores of Asia and America, from Behriug's Straits to 

 Massachusetts (op. cit. vol. ii. p. 390). In a later volume he adds that 

 a fine perfect and fresh but dead specimen of it was dredged by the 

 late Dr. Moller off Fan Isle, between the Orkneys and Shetlands, 

 while he himself got a valve in the same condition on the west 

 coast of Scotland (id. vol. v. p. 187). 



YI. Mya truncata, var. y3 Uddevallensis. — This is the more 

 northern variety of the ordinary Mya truncata. The normal form 

 has been dredged on the Dogger Bank and in Shetland and the Bay 

 of Biscay. I am not aware that the variety Uddevallensis has 

 occurred in our seas, but Jeffreys says he dredged an intermediate 

 form in Dourievoe in Shetland (op. cit. vol. iii. p. 70). 



VII. Saxicava sulcata. — There is much doubt whether this species 

 be now living at all (see Forbes, op. cit. p. 410). 



VIII. Pecten Islandiciis. — This shell is found living on the Nor- 

 wegian coast from Finmark to Bergen, and has been dredged in 

 a, semi-fossil state in the Grulf of Naples (Jeffreys, vol. v. p. 166), 

 where assuredly a Glacial Sea properly so called is most improbable. 



IX. Terehratula psittacea. — This is the Bhynchonella psittacea of 

 other writers. It occurs living in Finmark as far south as Tromso, 

 but valves of it have been on several occasions dredged in the 

 British seas (Jeffreys, vol. ii. p. 23, vol. v. p. 164; Forbes, op. cit. 

 p. 406). Forbes gives it as from the seas of Newfoundland, Labrador, 

 Greenland and Norway, 



X. Fusus cinereus. — This shell has been described from the 

 coasts of the United States (Forbes, op. cit. p. 425). 



XI. Fusus scalariformis. — A synonym for Troplion clatliratus. 

 Jeffreys tells us it inhabits Spitzbergen, Iceland, Norway and the 

 Faroe Islands, and the coasts of Northern Asia southwards to Japan, 



1 Eisso has recoried it, under the name of Cyprina Montagui, as fossil in the 

 " terrains diluTiens " at Nice. 



