192 TRANS. OF THE ACAD. OF SCIENCE. 
Length, 0.92; breadth, 0.67 ; thickness, 0.38. 
Major Hawn’s collection from the Lower Permian Rocks, 
in the valley of the Cotton-wood, K. T. 
Carprnia (?) sus-anguLata, Swallow. 
Shell oblong, sub-oblique, roa een eet aie 
ibs 0 
marked with strong, irregular, concentric ribs or plications, 
slightly convex, flattened ra hairs the margins. Beaks 
es: pro baa inclined forward and approxi- 
as be as the shell, and ibs osterior + ventral 
margin convex, rounded at et anterior ABP ens te and su 
ae oe t the posterior; an anterior margin short, edioal con- 
der} posterior ee. kee oe sub-trun 
oe cae 0.83 5 Aacosaey eadth, 0.58 ; aickanis 0.42. 
sata ‘froin oe Lower Permian re 
the valley of the Cotton-wood, K. T 
*. 
, Species undetermined, but similar to C. fascicularis — 
seers as given by ’ Pictet, Tra. Pal., pl. ExXxIXy — 
. It is like the 
Canprsta Listrrr (2), =isugidad Min. Con., z 123, ss 1h 
ot specimens are very sim 
they were x fom the same ueny 
ee ees ‘ebinet do not appear 
. Ci place." ™ : 
at : uilateral, gibbous, posterior end br 
oa y, anterior end short, peegrae 
extremit; ed towards the 
