39 St. Maurice and Claiborne Pelecypoda 39 



muscular impression of this side is oval and less distintinct ; an elevated 

 radiating line passes along its side ; margin entire. 

 Locality. — Claiborne, Ala. 



Cossmann seems to have gotten some specimens of this very 

 rare species in his barrelful of Claiborne sand, and has somewhat 

 rectified Me5'er's description, based solely on one worn speci- 

 men. He v^xy properlj^ compares it with media of the Paris 

 Basin, to which it is closely allied. 



The gibbose, small specimens figured bj^de Gregorio, pi. 23, 

 figs. 1 5- 1 9 of his work and referred to as ''delivis'' are certainlj' 

 not that species as its young are rather flattish, as will be seen b)^ 

 referring to pi. ig, of this work. They would fit in much better 

 \mth. ledoides, perhaps Conra.d' scorbulozdes. 



This species when well preserved in the Claiborne sands 

 shows traces of verj^ fine radiating sculpture, of a much more 

 even type than in pulchra or its mutations. Specimens from the 

 Orangeburg district are with practically no trace of radiate sculp- 

 ture. The species is very gibbose and corbuloid. This leads us 

 to wonder if perhaps Conrad's very elusive ' 'Limopsis corbuloides' ' 

 may not be this same species. A former note made at the 

 Phila. Academy is to the effect that in a traj^ in the Conradian 

 collection there are two original labels, one "Limopsis declivis"' 

 and the other ''Limopsis coi^hdoides" . Of the seven specimens, 

 six are of the St. Maurice stage declivis, "one however, smaller, 

 more inflated and cuneiform, doubtfully of the same species ' ' At 

 the present writing we are unable to say whether this smaller 

 specimen is the young of ^^ma or an adult ledoides. Conrad's 

 original description {oi corbuloides) reads : "Subtriangular, with 

 one side cuneate and angulated on the submargin ; beaks cen- 

 trals, cavity capacious, margin entire. ' ' No one seems to have 

 re-identified Conrad's species. Even he, while clearing up the 

 ''Limopses" in the Jr. Phila. Acad., IV, i860, p. 297, omits a 

 figure of corbuloides, though he carries it along in his list of '65, 

 Am. Jr. Conch., vol. i. 



7)//^.- Aldrich Coll. J. H. Univ. Coll. 



Horizon. — St. Maurice Eocene. 



