190 TRANS. OF THE ACAD. OF SCIENCE. 
namented with regular concentric coste and strive; beaks 
large and strongly i incurved. 2 
faj. Hawn’s pallpesiotl from the Lower Permian Rocks, in 
the valley of the Cotton-wood, K. T. 
EpMONDIA SEMIORBICULATA, Swallow. 
Shell elongate, sub-elliptical, inequilateral, slightly convex, 
ly curved at the extremities; posterior end, the wider 
regular! 
marked with aks concentric pleations with er ae 
2 cimens very much resemble the Kidivill Murchi- 
| sonia, ng, Soak eg pl .XIv., figs. 14 & 15,) but the plica- 
_tions are larger, ks more prominent and central, and 
oe rior margin satke lord convex. 
= ga pen 
: Neevra s ice : 
: Seer os sPxcrosi(?), Golfucs, Pet. . Ger p. 152, pe 
ig. 10 
: We have an imperfect cast which resembles the abo 
bison Nor 18 the Musche Ikalk. 
