_ EVANS & SHUMARD—NEW FOSSILS. 89 
surface with fine concentric strie of growth, waved and dentate 
posteriorly, where they are crossed by obscure longitudinal ribs. 
Dimensions.—Length, 5} lines; height, 42 lines; thickness, 
nearly 4 lines. 
Locality.—Moreau River. Very abundant. 
CarpiIUM RARUM. 
Shell small, ovate, subquadrate, moderately gibbous, imequiiat- 
eral, substance very ‘thin, length and breadth nearly equal; car- 
dinal edge short, somewhat sharp; beaks projecting above the 
cardinal margin, nearly -ogtral rather blunt, incurved ; umbo ob- 
pig somewhat gibbous, subangulated behind; posterior slope 
fi and 
abruptly to the ene margin; buccal ’palleal margins 
rou ae anal margin obliqu rH subtruncate ; crm ote 
pager ed with ti fine, nape nee: concentri shee 
Shem re : e, 
 rrerct surface, and the extreme thinness of the Viives The 
a te ribs on the posterior side are also nearly obsolete, 
and the more prominent. 
— length, 42 lines; width, 4 lines; os apd lines. 
Localities.—It is associated with Limopsis strato 
“Moreau and Grand Rivers. 
te baie -Anoa SULCATINA. 
