316 TRANS. OF THE ACAD. OF SCIENCE. 
Dr. Pope presented two specimens of Trilobite from the 
Niagara group, near the mouth of the Illinois River, at Graf 
no Charless Lo aaty a ‘Shark’s tooth and a cham- 
ered. shell allied to Megasiphonia ziczac, and other fossils, 
from the Eocene Tenia! in the vicinity of the Zeuglodon 
bed near the town of Choctaw in Clarke county, Alabama. 
Dr. Engelmann stated, that while on his recent visit in Eu- 
cess in procuring the execution of engravings for 
coming report on the Cactacee of the United States al 
Mexican boundary, shortly to be Leis rite by Congress. He 
_ enjoyed | sagan of examin g ihany pee pat 
ras Cacti, at Segre o 
