290 TRANS. OF THE ACAD. OF SCIENCE. | 
Notice of New Fosstus From THE PERMIAN orien 
‘ New Mexico anp Texas, collected by Dr. GEorcE G. 
Suumarp, Geologist of the United States Government 
Expedition for obtaining Water by means of Artesian 
Wells along the 32d Parallel, under the — ¥ 
Capt. Joun Porr, U. S. Corps Top. Eng. 2 aaa 
BY B. PF. SHUMARD, M.D. 
[Read March 22, 1858.] 
Propuctvus Porxt, WN. sp. 
“Shell of 1 nadir size, s ff eel wider ecg gre << | 
on width at the cardinal bord Dorsal valve (recetwmS 
valv ous, ¥ | | 
