ae Roberts— Scotland. 
10 & 11. Vertical and horizontal sections of the ‘ pectinated rhombs’ of 
Echinoencrinus armatus, Forbes; enlarged 2. 
12 & 13. Vertical and horizontal sections of Codonaster ; enlarged 4: a, the 
position of the anal; 0, of the central opening. 
14, Vertical section of Codonaster; enlarged about 2; showing the 
lining membrane. 
III. Groxtocicat Notes on ScotLtanp.—No. I. 
By Guorce E. Roperts, Esq., F.G.S., &c. 
NY Geologist travelling to Nairn, va Perth, will be interested 
(in a degree compatible with his sense of the nuisance created) 
in the wonderful outspread of wind-blown sand between Dalwhinnie 
and Kingussie. Ido not know any more wonderful drift of sand 
than is here displayed; a sand-surface so constantly in motion, that 
I believe it must really be in connection with the ever-shifting sand- 
drift of Culbin, near Elgin, which may be rightly termed the British 
Sahara. The nuisance caused by the constant settlement, even in 
the calmest weather, of this fine-grained siliceous sand upon every- 
body and everything passing through the district, was annoying 
enough, even in the old coaching days, but is increased tenfold to 
the traveller now that the Central Scottish Railway has superseded 
the more tedious method of travel; for the more rapid rate of 
motion raises such legions of blinding sand-atoms, that when Forres 
Junction was reached, a traveller is scarcely recognizable for the 
dust, and the vacant cushions are coated two inches deep. Indeed, 
I would call special attention to the Sands of Culbin, mentioned as 
probably being in geographical connection with the shifting sands 
cut through by the railway, as they have afforded the best instance 
of a real sand-storm known in Britain; hills of blown sand, from 
60 to 100 feet in height, and from 200 to 300 feet in circumference, 
having been formed by wind-action during a single night. 
The remarkable isolated mound of gravel and sand which stands 
in the throat of the Great Glen, about half a mile from Inverness, 
has always claimed the interest of geologists specially interested in 
the subject of drift-accumulations. To those who have not seen it, 
I may explain that it is a mound, about 130 feet high, 600 long, and 
250 wide, shaped like a galley turned upside down, from whence 
its name, Tomnahuirich. It is undoubtedly the remains of an accu- 
mulation of water-borne drift derived from the hills which tower 
over the chain of lakes now utilized as the ‘Caledonian Canal.’ I 
allude to it, however, on account of its geological composition having 
now been placed beyond a doubt; for however much I regretted to 
find that the well-wooded sides of the mound had been despoiled of 
some of their trees by the axe, I was rejoiced to see what fine 
sections were laid bare of well-stratified layers of sand and gravel, 
showing that the mound was but the remaining portion of a huge 
sand-bank which must, at a time prior to its denudation, have nearly 
closed the entrance of the ‘Straits of Ness.’ The spoliation of 
Tomnahuirich was a consequence of the hill having been chosen by 
