280 Scientific I sitellizence. 
In conclusion, the author enforced his view of the posteriority of the 
Old Red Sandstone to all such crystalline rocks by showing (as indeed 
Prof. Sedgwick and himself had done many years ago) that the coarse 
conglomerates of the Old Red Sandstone series, not only wrapped 
round those apes rocks, but were absolutely made up of their frag- 
ments, and are seen in many places distinctly to overlie them, as at 
Loch Ewe, Gairloch, Applecross, &c. He further adverted to the 
great diversity of the strike and dip of the two classes of rock and of 
their entire unconformity to each other, of which he cited an instruc- 
tive example at the head of Loch Keeshorn, where the lofiy massive 
mountains of the Old Red Sandstone of Applecross, the beds of which 
had a steady, slight inclination of 10° or 12° to the northwest, whilst 
the low flanking and conterminous primary neaaeae pe bait mica 
schists and gneissose rocks extending from Keeshorn to Loch Carron 
plunge rapidly to ihe east-south-east. In Ma ete se limestone of 
Durness in Sutherland (identical in all its mineral characters and asso- 
ciations with quarzites with that of Keeshorn in Ross) is of very remote 
antiquity, and is probably, from its fossils of Lower Silurian age, the 
base of the Old Red Sundatone, vt rms a great belt composed “of the 
regenerated materials of such o rocks, and distinctly overlies in a 
north, and east coasts of the Highlands. Referring in conclusion to 
the labors of Mr. Page, who had been zealously endeavoring to bring 
the Scottish Paleozoic classification into accordance with that of Eng: 
land, the author remarked, that, in respect to the position of the Lng- 
transition for the Upper Silurian rocks into the base of the 
Devonian ——- and in which we found one species of a fossil fish 
which occurs in unequivocal Old Red Sandstone, thin shells whi 
range ai the Ludlow rocks. They also contain forms of a re- 
markable genus of chia hat the Pter il which is known in the 
Arbroath paving-stones of Forfar. If, indeed, the Scotch grey paving- 
stones should prove to be the true fee ales of the English tile- 
stones (the species of Pterygotus of each being identical), and that it 
be truly shown that the ow conglomerate on the flanks of the Gram- 
pians underlies such Arbroath flagstones, then it will probably follow 
resent amount of knowledge, however, the geologist must 
believe that in this part of the Scottish Palzeozoic succession there |S @ 
great hiatus, since no suite of organic remains hitherto discovered has 
shown the presence of the Ludiow and Wenlock or Upper cee 
et in England, Sweden, Norway, Bohemia, and No 
8. Deser iption of the Mineralogical Cabinet of the Garden of ese 
i Portes by M. J A. A RD, Assintant to the Professor of Mineral- 
ogy. 12mo, pp. . ae “1855.—_This admirable guide to peat 
the ef 
rance, deserves to be made known to 
alogy who never expect to make use of it in examining 
stion itself, for which it was expressly preeeagts inasmuc 
shes Maa ilies ahaa Ss eS 
