624 CRETACEOUS PALEONTOLOGY. 



Formation and locality. — Woodbury clay, Haddonfield (183). 

 Geographic distribution. — New Jersey, Alabama, Mississippi, 

 Texas. 



Aenona papyria Conrad. 



Plate LXX., Fig. 26. 



1870. Mnona papyria Con., Am. Jour. Conch., vol. 6, p. 74. 

 1886. Mnona papyria Whitf., Pal. N. J., vol. i (Monog. U. S. 



G. S., vol. 9), p. 169, pi. 23, fig. 4. 

 1905. Mnona papyria Johns., Proc. Acad. Nat. Sci. Phil. 



(1905),?. 16. 



Description. — "Subelliptical, inec[uilateral, extremely thin in 

 substance, convex, anterior side narrowed; posterior end ob- 

 liquely truncated; ventral margin regularly curved; surface 

 marked by microscopic concentric close lines. Length, ^ inch." 

 (Conrad.) 



Remarks. — The type specimen of this species in the collection 

 of the Philadelphia Academy of Science has been much injured, 

 in fact almost entirely destroyed, and in its present condition does 

 not show the characters of the shell at all. The species has not 

 been met with in the recent collections, and it apparently rests 

 upon the single type specimen. The species seems to differ from 

 A. eufaulensis in the absence of the polished surface of the shell, 

 in the presence of the uneven, strong, concentric lines, in the 

 flattening of the shell at the anterior end, and in the shell sub- 

 stance being much thinner. 



Formation and localiy. — Woodbury clay, Haddonfield (183). 



Geographic distribution. — New Jersey. 



Super-family SOLENACEA. 



Family SOLENIDAE. 



Genus LepTosolen Conrad. 



Leptosolen biplicata Conrad. 



Plate LXX., Figs. 30-31. 



1858. Siliquaria biplicata Con., Jour. Acad. Nat. Sci. Phil, 2nd 

 ser., vol. 3, p. 324, pi. 34, fig. 17. 



