292 Miscellaneous Intelligence. 
s the pigment is an exceedingly attractive one, ae to be 
use 4 by naturalists in valuable drawings, it may not be out of 
place to call their attention to its ephemeral a es. o 
Professor Marsh's Bésky Mountain Expedition. Discovery 
of the Mauvaises Terres fervent in Colorado.—Prof. Marsh and 
he had already m a successful expedition to the Loup Fork, 
and obtained ee sdllbotbod of ah ar but they were pre- 
vented by the Indians from going on to the Niobrara region. The 
following is the copy of a later letter ® J. D. Dana, dated Pine 
south of the Wyoming State line. The strata there ane 
consisted of at least 150 feet of light-colored clays, overlaid by 
sandstones and conglomerates about 200 feet in thickness. Th 
lower portions of the clays are the true Titanotherium beds, con- 
taining many remains of Titanotherium Prou Above these 
lak e-basin, east of the Roe ocky Mountains, which is so cakes 
for its extinct animal remains. Our ur party traced the same forma- 
tion, with its more common fossils, about thirty miles northeast 
into "Wyoming, along the hills ra as Chalk Bluffs, and still 
farther north i * _ ine Bluff range. We hope soon to examine 
it - other poin 
Glaciers o Scotland. —Prof. se OLL, in a memoir on the 
. Benldersiny of Caithness,” in t ological Mapadne for 
J -, ~ 0, takes - Seige that the “boulder drift of Scotland is 
ot 
* The color sent by Mr. Dall is, as he supposes, mercuric iodid, well known 
toch emists as very volatile, changing at a gone heat from scarlet to nearly white, 
the latter by friction returning again to scar’ 
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