part 3] 



LOESS. ETC. OF THE IH IMIAM (OAST. 



L9( 



A species called ('. vagina occurs in the Crag of East Angli;». 

 and Belgium, but there can be no doubt that the Durham frag- 

 ments are referable to the recent species, C. siliqua. 





.1== 





r 



1/ 



, 



A 



i \ 



J 



It is recorded as Glycimeris siliqua from the Glacial beds of 

 Caithness l : these are said to consist generally of a dull, dark. 

 Leaden-grey or slate-coloured Boulder- Clay, which as a rule shows 

 no trace of stratification, hut contains fragments of Oolitic rocks 



1 J. Geikie, ' The Grout Ice Age ' 2nd ed. | 1*77 » p. 589 : li>t of the fossil 

 organic remains, by K. Etheridge jnn. 



