241 LiGNiTic Stage 49 



Cucullaea gigantea, var. PI. 8, figs. 3, a. 4. 



Syn. C. transversa Aid., Bull, i, Geol. Surv. Ala., p. 40, pi. 4, figs. 11, 

 iia, and p. 57, 1886. 

 C. transversa Har., Amer. Jour. Sci., vol. 47, p. 302, 1894. 



The original description of C. gigantea Con., in the Jour. 

 Acad. Nat. Sci. Phila., vol. vi, p. 227, pi. 10 fig. 4, 1830, was 

 drawn from the very imperfectly preserved large casts in the vi- 

 cinity of Ft. Washington, Md. and hence gives but little definite 

 knowledge regarding the specific features of this fossil. For the 

 sake of completeness however, the description is here repeated. 



Conrad's original descriptioyi . — "Shell subtriangular, obliquely 

 cordate ; very ventricose, with numerous longitudinal sulci ; an- 

 terior side flattened, produced and subcuneiform ; posterior side 

 very short ; unibones gibbous ; beaks distant, and much in- 

 curved. 



' ' Three and three-quarters inches in length ; and five and 

 a quarter inches in breadth." "Cabinet of the Academy." 



Early in 1894 the writer pointed out the probable equiva- 

 lency of the Alabama forms with the C. gigantea. Sufficient 

 material however, was not at hand to warrant uniting them 

 without reserve. During last summer's work along the Rap- 

 pahannock and Potomac this species was specially sought after; 

 and by examining the colledlions with some care it is apparent 

 that there is but one species of Cucullcza in the Virginia Eo- 

 cene, i.e. that gigantea^ ono?ichela, idonea, and transversa are 

 in all probability the same. 



This southern form which for various reasons Aldrich and 

 the writer have referred to transversa does vary somewhat from 

 the Virginia specimens, but scarcely enough to call another 

 species. 



This matter will be more carefully discussed in a future 

 publication on the Eocene of Maryland and Virginia. 



Localities. — Alabama: Gregg's Landing, Bell's Landing. 

 Georgia : Ft. Gaines, bed 8; see. p. 33. 



Type. — Academy Natural Sciences, Philadelphia. 



Specimens figured. — Gregg's Landing, Harris' collection. 



Pectunculus idoneus, PI. 8, figs. 5, a. 6. 



Syn. P. idoneus Con., Foss. Sh., Tert. Form, p. 39, 1833. 



Pectunculus (n. sp. ) Tuomey, 2d Biennial Rep't, p. 271, 1858. 



