216 [Sept. 21, 
Service, Coast Survey, National Museum and Fish Commis- 
sion; C. O. Thompson, of Terre Haute; Dr. Ladislaus Netto, 
George Basil Digwell, and the State Geological Survey of 
Illinois. 
The death of John C. Trautwine, at Philadelphia, Septem- 
ber 14, 1883, aged 74, was announced by the Secretary. 
The following communications were read : 
From Prof, K. W. Claypole, New Bloomfield, Perry county, 
Pennsylvania : 
1. Ona large Crustacean from the Catskill rocks of Me- 
shoppen, Wyoming county, Pa., in the collection of Mr. Lacoe, 
of Pittston, Pa., with a small photograph of the head; a plas- 
ter cast of which was exhibited. 
9. On the genus Rensselaeria in the Hamilton group, in 
Perry county, Pa. 
3. On the equivalent of the New York Portage, in Perry 
county, Pa, 
From Prof. E. D. Cope, a letter to the Secretary, dated 
Sully Springs, Dakota, Sept. 7, 1883, was read, as follows: 
“‘T have the pleasure to announce to you that I have within the past 
week discovered the locality of a new lake of the White River epoch, at a 
point in this Territory nearly 200 miles north-west of the nearest boundary 
of the deposit of this age hitherto known. The beds, which are unmis- 
takably of the White River formation, consist of greenish sandstone, and 
sand-beds, of a combined thickness of about 100 feet. These rest on 
white calcareous clay, rocks and marls, of a total thickness of 100 feet. 
These probably also belong to the White River epoch, but contain no 
fossils. Below this deposit is a third bed of drab clay, which swells and 
cracks on exposure to weather, which rests on a thick bed of white and 
gray sand, more or less mixed with gravel. This bed, with the overly- 
ing clay, probably belongs to the Laramie period, as the beds lower in the 
series certainly do. 
“The deposit as observed, does not extend over ten miles in north and 
south diameter. The east and west extent was not determined. 
“The fossils, which indicate clearly the age of the formation, are the 
following * 
PISCES. 
Rivineaetes, 8). DOV cowl vce ddeervrrvvriace delldlid es cael 
ANATUNIG, BPs TOV. ceaceesertiabsccvedcdues ileal inca J 
