238 TRANS. OF THE ACAD. OF SCIENCE. 
Dxscriptions or New Species or BrastomeEa from the 
Paleozoic Rocks of the Western Sept with some Obser- 
vations on the STRUCTURE OF THE SUMMIT OF THE GENUS 
PENTREMITES. ~ 
BY B. F. SHUMARD, M.D. 
CopasTER PrRAmMIpATus, J. sp. 
(Pl. IX., fig. 1 a—e.) 
this species is small, five-sided aa the 
summit tioderstely convex, and its contour ——s i 
onal. surface is se ree marked with 
ce to the edges of the piece 
is triangular, p cata 1, Bisrames at the angles, 
‘icted about ong ~ 
