14 
PROCEEDINGS OP THE ACADEMY OF 
S u 
1% 
4 
-a . 
o 
^" 
0 
CO 
^' 
o 
t.1 CO 
o r 
I ^ 
R pq 
1 - 
River 
orth, 6 
^ § 
Lands 
brask 
o 
Missou 
ark, 47 
gia, 34' 
andria 
ms, La 
ence or 
5 Rivei 
St.L 
and 
s ^ 
'3 
o 
o 
Alex 
Orlej 
O M 
Unio rubiginosus, Lea. 
1 
1 
1 
" luteoliis, Lam. 
1 
1 
1 
1 
1 
] 
" laevissimus, Lea. 
1 
1 
occidens, Lea. 
1 
1 
" anodontoides, Lea. 
1 
1 
1 
1 
" asperrimus, Lea. 
1 
1 
L 
1 
elegans, Lea. 
i 
1 
rectus, Lam. 
1 
1 
1 
1 
" zig-zag; Lea. 
1 
" alatus, Say. 
1 
1 
1 
1 
1 
1 
" undulatus, Bar. 
1 
Anodonta Ferussaciana, 
Lea. 
1 
1 
" decora, Lea. 
1 
Margaritana complanata, 
Lea. 
1 
1 
Dr. Leicly read the following letter : 
Saint Louis, March 16, 1858. 
My Dfar Sir,— I have the pleasure of announcing to you, that I have just 
completed an examination of some fossils, collected by Dr. G. S. Shumard from 
the White Limestone of the Guadalupe Mountains, New Mexico, while he was 
connected with the expedition of Capt. John Page, and I am fully convinced that 
these fossils are Permian, The collection contains about forty species, a number 
of which are identical with species of the Permian system of Russia and England. 
We have specimens which agree perfectly with Verneuil's descriptions and 
figures of Camaraphoria Schlotheimi and C. Geinitziana from the Permian System 
of Russia. We have also an Aulosteges which^resembles A. Wangenheimi (Ver- 
neuil,) though it is doubtless a distinct species. This genus has not, I believe, 
been found lower than the Permian. 
The Procluctus Leplayi'iQ represented, and there is another Productus which is 
very analogous to P. cancrini, (Vern.) The Spirigera pectinifera, (Vern. sp.) 
Terehratula svpcrstes, (Verneuil,) Spirifer cristata and S. permiana, of King, are 
undoubtedly in our collection, and also Acanthocladia anceps, (King) and Syno- 
cladia virgulacea, (King,) all of which are species of the Permian of Russia and 
England. Besides, there is a Monotis which resembles 31. speluncaria. We also 
recognized several species that are in Professor Swallow's collection from the 
Permian Rocks of Kansas. According to measurements made by my brother, 
these Permian Rocks attain a thickness of more than a thousand feet in the 
Guadalupe Mountains. The rock is a remarkably pure white limestone, and 
portions of the mass abounds in fossils. It is underlaid by sandstones and lime- 
stones of the coal measures, containing the same fossils as characterized this 
formation in Missouri, Iowa and Illinois, but in New Mexico scarcely a single 
species ranges from the Coal Measures into the Permian. 
I am now engaged in preparing descriptions of the new Permian Fossils. Will 
you be kind enough to announce this discovery at the next meeting of the 
Philadelphia Academy. Sincerely yours, 
B. F. Shumard. 
Mr, Lesley exhibited a specimen of lignite from the Upper Wachita 
River, Louisiana, received through Mr. Perry, of New Orleans. It is 
remarkable for containing rosin in quite visible masses. Sometimes the 
1858.] 
