320 Proceedings of the Royal Physical Society. 



the Ord and Dunbeath, on the east coast of this county. 

 The evidence now referred to will be described when we 

 come to discuss the direction of the ice-flow and the character 

 of the boulder clay. 



In 1871, a paper appeared in the Transactions of the 

 Geological Society of Glasgow, by the Eev. Henry Crosskey 

 and David Eobertson, in which they give a short account of 

 the boulder clay sections near Wick, along with a list of the 

 Foraminifera obtained from that deposit.* 



In the volume of the publications of the Palseontographical 

 Society, published in 1874, Messrs G. S. Brady and Eobertson, 

 in their "Monograph on the Post-Tertiary Entomostraca," 

 describe the boulder clay near Wick, and give a list of 

 Entomostraca from the sections in Wick Bay and burn of 

 Haster.f 



Before leaving this part of the subject, reference ought to 

 be made to the labours of Mr Joseph Anderson, Curator of 

 the Antiquarian Museum, Edinburgh. Though he is more 

 widely known by his researches among "the Picts' Houses" 

 in Caithness, yet, during his residence in Wick, he was an 

 earnest worker at the present subject, and several observers 

 have been indebted to him for valuable assistance. He was 

 the first to wash the Caithness boulder clay for microscopic 

 organisms — a process which has added greatly to the list of 

 the fauna obtained from that deposit. 



III. Glaciation. 



The greater portion of the county is occupied by strata 

 belonging to the Old Pted Sandstone formation, of which the 

 most prominent subdivision is the well-known Caithness 

 Flagstone series. A line drawn from Ben Ptha, near Reay, 

 south-eastwards by Loch Scye, Loch More in Strathmore, to 

 Morven and the Ord, marks the inland limit of this forma- 



* "The Post-Tertiary Fossiliferous Beds of Scotland," by the Eev. H. W. 

 Crosskey and Mr D. Robertson, Trans, of the Geol. Soc, of Glasgow, vol. iii., 

 p. 126, 127. This paper was read in 1868. 



+ "Monograph of the Post-Tertiary Entomostraca," by Messrs G. S. Brady, 

 the Rev. H. W. Crosskey, and Mr D. Robertson, Palaontographical Soc, 

 vol. xxviii., p. 7, 1874. 



