SWALLOW—DESORIPTION OF FOSSILS. 641 
but it is easily distinguished by its obsolete plications, and 
the greater length of its cardinal line. 
Abundant in the Chouteau Limestone of Cooper county. 
PRODUCTUS MAGNICOSTATUS, N. sp. 
> 
of the valve is marked numerous fine, transverse ruge ; 
a few large spines are scattered over the visceral region, with 
one or two rows on each ear; dorsal valve not seen. 
Shell is distinguished from all our Producti by its larger 
and more elevated plications. 
ound by Dr. Norwood, in the Coal Measures of Johnson 
county. 
SPrRIFER ANNE, N. Sp. 
Shell 
pyramidal; slightly arched from the beak to the anterior and 
lateral margins; area high, arched, triangular; sides shorter 
‘ foramen narrow. Dorsal va 
semicircular, slightly convex, flattened towards the cardinal 
extremities; mesial fold sharply defined, depressed, simple ; 
beak small, slightly incurved over the cardinal line; ¢a inal 
Ine as long or shorter than the width of the shell. Surface 
ie lamelle. 
ength, .25; breadth, .33; thickness, .20. : ha 
Tn the Hamilton rocks of "Callaway county, with Spirige- 
ra Fultonensis 
Srrrtrer OsAGENSIS, N. Sp- 
