1905.] NATURAL SCIENCES OF PHILADELPHIA. 9 



CucuUaea alabamensis Gabb. 



Idonearca alabamensis Gabb, Proc. Acad. Nat. Sci., 1876, p. 31.5. 

 The type, a characteristic specimen of Prairie Bluff, Alabama, is so 

 altered by the work of the boring sponge (Clione) that all shell charac- 

 ters are obliterated. It is probably a synonym of C. vulgaris or 

 tippana. 



CucuUaea littlei Gabb. 



Idonearca littlei Gabb, Proc. Acad. Nat. Sci., 1876, p. 316. 



Trigonarca cuneata Gabb, Proc. Acad. Nat. Sci., 1876, p. 316. 



Trigonarca cuneiformis Conrad, Amer. Jour. Conch., V, 98, pi. IX, f. 1, 1867. 



Cibota obesa Whitfield, Man. U. S. Geol., IX, 93, pi. XI, figs. 30, 31, 1885. 



Cibota multiradiata Gabb, Proc. Acad. Nat. Sci., 1860, p. 95, pi. II, f. 1. 



Nemoaroa oretacea Conrad, Amer. Jour. Conch., HI, 97, pi. IX, f. 21, 1869. 



Area rostellata Morton, Syn. Org. Rem., 64, pi. Ill, f. 11, 1834. 



Area uniopsis Conrad, Jour. Acad. Nat. Sci., II, 2 ser., 275, pi. 24, f. 17, 1853. 



Area altirostris Gabb, Proc. Acad. Nat. Sci., 1861, p. 325. 



Area quindeeemradiata Gabb, Proc. Acad. Nat. Sci., 1860, p. 95, pi. 2, f. 1. 



Area saffordii Gabb, Jour. Acad. Nat. Sci., IV, 2 ser., 397, pi. 68, f. 37, 1860. 



Represented only by the New Jersey specimens referred to this 

 species. 



Area lintea (Conrad). 



Barbatia (Polynema) lintea Conr., Kerr's Geol. Sur. N. Car., II, pp. 4, pi. I, 

 f. 12, 1875. 



Area carolinensis Conrad. 



Barbatia (Plagiarca) carolinensis Conr., Kerr's Geol. Surv. N. Car., I, App., 

 p. 4, pi. I, f. 11, 1875. 



Nemodon eufalensis (Gabb). 



Area (Macrodon) eufalensis Gabb, Jour. Acad. Nat. Sci., IV, 2 ser., 398 

 pi. 68, f. 39, 1860. 



Whitfield's so-called type (pi. 12, fig. 5) may represent another 

 species or the same as Conrad's, but the exterior is so eroded that spe- 

 cific characters are obliterated. 

 Nemodon eufalensis Conrad, 1869 (not of Gabb). 



Conrad's type of the genus Nemodon {Am. Jour. Conch., Ill, 9, and 

 V, 97, pi. IX, f. 16). This is a very different species from Nemodon 

 eufalensis Gabb. I therefore propose the name of N. conradi for this 

 species. 



Nemodon angulatum Gabb. 



Leda angulata Gabb, Proc. Acad. Nat. Sci., 1860, p. 94, pi. II, f. 12. 

 Nemodon brevifrons Conr., Kerr's Geol. Sur. N. C, App., p. 4, pi. I, f. 15, 1875. Type? 



The specimen figured by Whitfield (pi. XII, figs. 1, 2) as probably 

 from Haddonfield, New Jersey, is more likely to be from Snow Hill, 

 North Carolina. The micaceous "marl" from Haddonfield is harder, 



