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Proceedings of the Royal Society of Edinburgh. [Seas. 
ooze — in which it appears to have been partially embedded. On the 
exposed side it bears sessile foraminifera, both arenaceous and hyaline, 
and some dried-up horny-looking patches, liked dried tunicates. The 
stones are all remarkably fresh, and do not seem to have lain long in their 
present position. 
As this Station is in the direct route of the icebergs and pack-ice 
brought down by the cold current to this latitude almost yearly, the source 
of the striated stones is probably to be looked for in the Arctic regions, 
whence such an assemblage could easily emanate. Fossiliferous Tertiary 
strata associated with basic volcanic rocks resting directly upon an old 
gneissose floor are found in West Greenland. No organic ooze appears to 
be forming at this locality, and the sandy mud in which the stones are 
embedded is in all ^probability supplied by the floating ice. 
Station 101. 6th August 1910. 
Lat. 57° 4F N., long. 11° 48' W. ; depth 1853 m. (1013 fms.). 
Hard clay bottom. 
Only one specimen of a reddish fine-grained flaggy sandstone measuring 
4 x 3 x f inches comes from this Station. It is an ellipsoidal disc, glaciated 
round its edges, and is evidently only a portion of a large egg-shaped 
striated boulder which has split along its original bedding plane. 
Rocks exactly similar in lithological characters to this specimen occur 
in the Old Red Sandstone formations as developed in Shetland, Orkney, 
and Caithness. Several glaciated boulders of identical character have been 
brought from stations in the dredgings made along the Wyville Thomson 
ridge which connects the north of Scotland with the Faroe Banks. These 
stations are intermediate between Shetland, Orkney, and Caithness and 
Station 101. Reference will be made to this and other points based on the 
study of the finer deposits from Station 100 when the distribution of the 
material from the dredgings of H.M.S. Knight Errant and Triton are 
treated of. 
Rock Specimens from North Ron a collected during the Cruise 
of H.M.S. “ Knight Errant.” 
Two groups of rocks are represented in the twelve specimens from 
North Rona, viz. a series of banded hornblende-biotite gneisses with 
associated granite and pegmatite, all of the Cape Wrath type of the 
Lewisian Gneiss, evidently representing the “ Country Rock ” of the island, 
