71 St. Maurice and Claiborne Pelecypoda 71 



fig- 5- 



Conrad's oHo-i/ia/ description. — Subovate. ventricose, with minutely 

 closely arranged concentric lines ; anterior side longest, pointed, slightly 

 recurved, without a submarginal groove or fold ; base profoundly rounded. 

 Length 7-16. Height %. 



"All the preceding fossils are from the Eocene rocks of St. Matthew's 

 Parish, Orangeburg District, South Carolina. Not one species of this local- 

 ity is known in the Lower Eocene of Claiborne or elsewhere, nor in the 

 Upper Eocene of Vicksburg, and therefore the relative age of the deposit 

 is uncertain but it unquestionably belongs to the Eocene period. Near this 

 rock Mr. Vanuxem found quite a different class of shells consisting of casts 

 in indurated clay. The relative position is undetermined. Two of the shells 

 are described and named Tellina subequalis and Lutraria petrosal 



Adrana aldrichiana Harris, PI. 25. Figs. 20-21. 



L. {Adrana) aldrichiana Harris, Proc. Phila. Acad. Nat. Sci., 1895, 

 p. 47, pi. I, fig. 6. 



Han is' s oris^inal description. — .Size and general form as indicated by 

 the figure ; exterior smooth and polished ; within smooth ; sinus small ; 

 posterior [anterior] row of teeth much the longer. 



The type .specimen is compre.ssed vertically, the umbo should 

 be somewhat more elevated than is repre.sented by the figure. 

 The type is in the Aldrich collection of Johns Hopkins Univ. It 

 was from a locality half a mile below Mosley's ferry on the Bra- 

 zos River, Texas. A cast of elongate Taxodont probably 

 of this species is in our collection from the region about Roberta, 

 La. (fig. 20), 



"Nucula capsiopsi8"deGregorio, PI. 25. Figs. 22-23. 



A\ capsiopsis de Greg., Men. Faun. Eoc. Ala., '92, p. 187, pi. 22, figs. 



23-24. 

 DeGregorio's original description.— T&sta. minuta, tenuis, elegans, 

 elliptica, sequilatera, laevigata ; umbone minimo, centrali ; cardine lineari ; 

 dentibus 6 ad latus. L. 3 mm. 



C'estun tres petite coquille, mais ayant des characteres bien definis. 

 — (Coll. mon Cabinet). 



This very little, presumably immature, .specimen de Gregorio 

 describes along with his material coming mainly from the Clai- 

 borne sands, but he gives no definite locality for this particular 

 species. We have found nothing of the kind from the mid- 

 Eocene of Alabama. 



