Reports and Proceedings. . 219 
Period; and this, he said, was proved by the arrangement of the 
stratified sands and sandy clays, by marine shells of an Arctic type 
that have been found in them, and by the embedded boulders and 
surface-erratics from Norway and Sweden, which could not have 
been transported by land-ice from a distance of 400 or 500 miles to 
heights, in some places, of 1,100 feet above the level of the Baltic. 
(2) That the heights at which those erratics have been found lead 
us to believe that this glacial sea must have been at least 1,100 feet 
in depth; but several other circumstances would lead us to infer that 
it may have had a depth of 2,000 feet; and the only reasonable way 
of accounting for the position of those erratics, as well as of the 
isolated clusters of boulders in the sands, is, that they had been 
transported to those places by icebergs and ice-floes. (3) That, if 
the Plain of the North of Germany during any part of the Post- 
pliocene epoch had enjoyed a sub-aérial condition, it must have been 
as sandy and as barren as the desert of Zahara: for we have no 
proof either of land-glaciation or of sub-aérial vegetation; and the 
few remains of the land fauna and flora that have been found, fre- 
quently in juxtaposition with sea-shells and the skeletons of Whales, 
must have been borne to the low grounds by rivers and marine cur- 
rents.—Mr. D. J. Brown read a notice of the Occurrence, near 
Granton, of recently formed Sandstone, containing Shells of living 
Species.— G. C. H. : 
Giascow GEoLocicaL Society.—At the Monthly Meeting, April 
10th, thé Rev. H. W.Crosskey in the chair, Dr. Witt1am Grossart, 
of Salsburg, parish of Shotts, sent for exhibition a specimen of a 
little fossil fish, belonging to the genus Palgoniscus, got by him in 
the coal-shale of that district. It measures only an inch and a half 
in length, and is probably an undescribed species, being marked by 
much stronger striated scales than any of the species hitherto found 
in our coal-field. 
Mr. James Armstrone exhibited specimens of the masticating 
organs of Dithyrocaris, a crustacean of the Carboniferous Limestone 
series, from Orchard Quarry, where they are not uncommon. They 
present the appearance of a group of small blunt crushing teeth, and 
generally are found in ironstone-nodules, and in greatest perfection 
when, by the wearing away of the surrounding matrix, they have 
not been too long exposed to the action of the weather. ‘The only 
notice of their occurrence is in the ‘ Report of the Geology of Lon- 
donderry,’ where two are figured and described by Portlock as pro- 
bably connected with the masticatory apparatus of Dithyrocaris, with 
the remains of which they are stated to have been found. At Or- 
chard no portion of the carapace or tail has yet been discovered ; 
but Mr. James Bennie, one of the Members, had recently found in 
a quarry near East Kilbride a half-opened carapace (which was 
exhibited to the meeting) showing in the interior two groups of 
these teeth (?), with the tubercles in contact, and evidently not far 
from their normal position. Mr. Armstrong also exhibited speci- 
mens of Nautilus tuberculosus from Arden Quarry and Carluke, and 
