168 
TRANS. OF THE ACAD. OF SCIENCE. 
October 21, 1861. 
The President, Dr. Engelmann, in the chair. 
Seven members present. 
A letter was read from Dr. Charles T. Jackson, of Boston, 
acknowledging his election as a Corresponding Member. 
The following donations to the library were received : 
Dr. Shumard presented Exogyra arietina from the Creta¬ 
ceous of Texas, and several ;Naiades from the Ohiq.River. 
Dr. Shumard called the attention of the Academy to a new 
Crustacean from the Cretaceous of Hempstead Co., Ark., pre¬ 
sented to the museum by Dr. Koch. Dr. Shumard proposed 
for it the name Mesostylus Americanus. 
Dr. Shumard exhibited a series of specimens of his Ostrea 
subovata ( 0. Marshii, Marcou) from the Washita Limestone 
of Fort Washita and Austin, Texas, and among them the 
original specimen described by him in Marcy’s Report. 
Prof. Joachim Barrande, of Prague, Bohemia, was elected 
a Corresponding Member. 
