39 ^T. 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 ver_\' 

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

 rectified Meyer's description, ba.sed solely on one worn speci- 

 men. He verj- properly compares it with media of the Paris 

 Basin, to which it is clo.sel\' allied. 



The gibbose, small specimens figured b}' de Gregorio, pi. 23, 

 figs. 15-19 of his work and referred to as ''delivis' are certainly 

 not that species as its j'oung are rather flatfish, as will be seen by 

 referring to pi. 19, of this work. They would fit in much better 

 v:\\\\ ledoides, perhaps Qonx2i<\'s corbitloides. 



This species when well preser\-ed in the Claiborne sands 

 shows traces of very 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 gibbo.se and corbuloid. This leads us 

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

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

 Phila. Academy is to the effect that in a tray in the Conradian 

 collection there are two original labels, one "Limopst's declivis^' 

 and the other "■Limopsis corbuloides". 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 fl'^m^^ 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 li.st of '65, 

 Am. Jr. Conch., vol. i. 



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



Horizon. — St. Maurice Eocene. 



