422 Scientific Intelligence. 
matter, as I did ee the great draanr of my excellent 
friend Prof, Hind. I have not yet had the desired opportunity, 
and yet I have had to wilt on the pee first, to the Geological 
Society of London.at the —— of Prof. Hind ; second, to the 
oo. Journal of Scien the instigation of Dr. Hunt. 
iptions of Bovsile sone by the U.S. Geological —- 
under renee charge of Clarence King, Esq. (Proc. Acad. Nat. 
Philad., No. 1, 1870).—Mr. Meerx prefaces his numerous ear 
tions of ai species by the following Phteeiiticine; addressed to 
Prof. Josep idy. 
I send sine to be presented for publication in the Proceed- 
ings of the Aca ademy, descriptions of a few of the fossils eae 
in by the United States Geological Survey under the direction of 
Clarence King, Esq. You will please state, in presenting the poset 
that the Trilobites described in it from Eastern Nevada, are deci- 
dedly Primordial types, and, so fn as I know, the first fossils of 
that age yet brought in from a any locality west of the Black Hills. 
Mr. Kin ng’s collections = establish the fact that the rich silver 
mines of the ite Pine district occur in Devonian rocks, though 
the Carboniferous is ade well developed there. The Devonian 
at appe 
belong to the oe of the oon Helderberg limestone of the 
New York se seri 
esting fresh-water Saciehinad Setusit, 
ally, and some generically, from all the other Tertiary fossils yet 
brought from =~ far west. Two of the species belong to the ex- 
isting California genus Carinifex, or some closely allied group, 
while — heal sculptured species was thought, by 3 
Tryon whom I sent a specimen of it, to be possibly a sone 
dpa: and allied to existing Asiatic forms. 
t is an interesting fact, that among all of our fresh-water Ter- 
tiary shells from this distant internal part of the a nei- 
ther the beaks of the bivalves, nor the apices of the spire 
univalves, is ever in the slight test de egree eroded; even iis most 
rin, 
Pertiary epoch, were nas or less alkaline, as is the case with many 
of those there at the present day. 
hese descriptions, as well as others that I expect to send you 
Soon, are merely preliminary and will be re-written, and ge 
with full — now in course of sy elon 
— rt of sgl 
