rine station at Roscoff and its enthusiastic master long continue the 
work which has had so much influence on French science, and may 
its liberality and hospitality be imitated and fostered in other lands 
by other people. 
ON THE PERMIAN FORMATION OF TEXAS. 
BY CHARLES A. WHITE. 
' Published by permission of the Director of the U. S. fieological Survey. 
DURING the past ten years Prof. E. D. Cope has from time to 
time published descriptions and figures of vertebrate remains 
from Texas which he referred to the Permian,"^ although other 
authors have generally regarded the formation from which the fos- 
sils were obtained as of Triassic age. 
A year ago Mr. W. F. Cummins, Assistant State Geologist of 
Texas, who had collected a large part of the vertebrate fossils just 
referred to, gave me a small suite of invertebrate fossils which he 
had collected from the same formation with the vertebrates. I 
found these fossils to possess so much interest that I afterward, in 
company with Mr. Cummins, visited the region in question and 
made collections from, and observations upon, the formation con- 
taining them. 
Thirty-two species of invertebrates were collected, about one- half 
of which were readily recognized as well-known Coal-measure spe- 
cies, but a few of them were new, among which are two belonging 
to mesozoic types. It is this paleontological feature, in connection 
with important correlated facts, that especially excited my interest 
in the formation from which the fossils were obtained. 
Although I have personally examined a considerable portion of 
the region within which this formation occurs, I am indebted to 
This a 
f or his summary c 
Philos. Soc. Vol. XVI 
