DEaR Sir: — 
You will please find herewith the report on the specimens of fossil plants which 
you have intrusted to me for examination. 
These vegetable remains represent merely leaves which, embedded in a fine-grained 
whitish clay or soapstone, are generally, for their outlines at least, in a very good 
state of preservation. The arcolation of those from the Chalk Bluffs of Nevada 
County is, however, generally rendered obsolete by a coat of varnish, which also 
gives to them an apparent thickness which may not represent their natural char- 
acter. The words “coriaceous” and “ subcoriaceous,’ used in the description of 
these leaves, might therefore be taken with some degree of uncertainty. However, 
in comparing the leaves of Mr. Voy’s collection which have been varnished with 
those of the same locality belonging to yourself, and those also of Tuolumne 
County which have been left in their original state of preservation, the texture of 
all appears of the same consistence. 
Except the specimens which are your own property, all the others, under the 
name of the Voy Collection, belong to the University of California, and have been 
returned to that institution. 
Very respectfully yours, 
L. LESQUEREUX. 
To Pror. J. D. Wuitney, 
Cambridge, Mass. 
