140 Scientific Intelligence. 
infusorial forms of Oregon and California being wholly different from 
those of the east side of the mountains, while they are partly identical 
with Siberian species. This fact is confirmed by his examinations of 
earth from the gold region of California, and from the Chutes river of 
Oregon, obtained by Fremont. ‘The latter deposit is situated at an ele- 
vation of seven to eight hundred feet, and constitutes a bed five hundred 
feet thick of porcelain clay. It is overlaid by a layer of basalt one 
hundred feet thick. 
Prof. Bailey who examined this material for Fremont, reported that 
it consisted of fresh water infusoria, and many species were distinguish- 
ed.* Ehrenberg on farther investigation has made out seventy-two 
species of polygastrica with siliceous shells, sixteen species of phytoli- 
thuriens, and three of crystalline forms. e more 
from the Falls of the Willammet. 
. On the Fossil American Tapir ; by Josern Leipy, M. D., (Proc. 
Acad. Nat. Sci., Philad., June, 1849, p. 180.)—Dr. Leidy in his memoir 
describes portions of the fossil Tapirus americanus, and sustains the 
view that it is identical with the recent T. americanus. 
IV. Astronomy. 
1, On Nebule observed with Rosse’s Telescope, (Proc. Brit. Assoc., 
1849, Athen., No. 1143.)—At the meeting of the British Association 
at York, in 1844, it was announced that a reflecting telescope of six 
feet aperture, which had been about two years in progress, was nearly 
completed, and some slight account was at the same time given of the 
means which had been taken to render the instrument convenient and 
effective. A short notice of the principal results which have since 
been obtained may perhaps not be uninteresting to the present meeting. 
In the beginning of February, , the instrument was so far finished 
as to be useable, and in the first instance it was directed to some of the 
