J. W. JUDD ON THE SECONDAKY KOCKS OE SCOTLAND. 705 



Schloth. sp. ; Lima gigantea, Sow. ; and fragments of Echinodermata. 

 It is evident that these have been derived from the Boulder-clay, 

 which is so extensively developed in the peninsula which separates 

 Loch Ewe from Gruinard Bay; and, as pointed out by Professor Nicol, 

 their abundance lends support to the conclusion that beds of this age 

 are now concealed by Glacial drift, or at all events that they were in 

 existence in the immediate neighbourhood at the very recent geologi- 

 cal period when those deposits were accumulated. It is scarcely 

 necessary for me to recall attention to the fact of the frequency with 

 which we have to appeal to evidence of the same kind on the east 

 coast of Scotland, where abundant traces of the different members of 

 the Cretaceous and Jurassic systems are found in the Boulder-clay and 

 gravels of the area ; though as regards some at least of them it is 

 certain that no trace of the existence of beds in situ, which contain 

 the same characteristic fossils, can anywhere be detected. 



Among the fragments of limestone derived from the Boulder-clay 

 at Loch Ewe, and which were once collected in sufficient abundance 

 to supply a lime-kiln, there are found representatives of both the 

 Infralias and the Lower Lias. It is probable that the patch of 

 Poikilitic strata let down by faults at Gruinard Bay, and now so 

 greatly obscured by drift-deposits, is, or at all events was at the 

 time of the Glacial period, capped by Bhsetic and Liassic strata. 



At Applecross, however, there can be no doubt that the Lima- or 

 BucJclandi-loeds of the Lower Lias occur in situ. In the year 1872 

 I Was so fortunate as to see some excavations made in the district 

 between the two burns in which the sections of the Infralias beds, 

 already described, were found. These excavations were made in 

 deepening a watercourse, and exposed beds of limestone-rock crowded 

 with Gh'yphcea arcuata, Lam., of the typical form, and containing also 

 many other shells characteristic of the Lias a. The great floors of 

 rock crowded with Gryphcew were especially striking here. 



Among the fossils that I collected at this locality were Ammonites 

 Jcridion, Hehl, Qryjphoza arcuata, Lam., Lima gigantea, Sow., L. 

 succincta, Schloth. sp., L. punctata, Sow. sp., Modiola ■ psilonoti, 

 Quenst., Avicula sinemiwiensis, D'Orb., Pecten textorius, Schloth., 

 Pecten, sp., Unicardium cardioides, Phill., Cardinia Listeri, Sow. sp., 

 G. crassiuscula, Sow. sp., Cardinia, sp., Astarte dentilabrum, Eth. 

 Many of the beds of rock were seen to be completely made up of 

 these and other shells. 



Fragments of the same strata are found along the shores of 

 Applecross Bay to the north of the Old-Mill burn. Some of these 

 fragments are crowded with the ossicles of Peniacrinus ; and in one 

 of them I found a gigantic specimen of Ammonites Buclclandi, Sow., 

 with Ostrea (Terquemia) arietis, Quenst. sp., attached to it. 



So far as the limestones of Applecross Bay are concerned, they are 

 identical in their characters and fossils with the Lower-Lias lime- 

 stone floors of England. They appear here to alternate with thick 

 beds of shale, which are, however, nowhere well exposed in section. 



In the great cliff-section of Raasay lying opposite to Applecross 

 Bay the Lima-heds are fairly well exposed, the floors of limestone 



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