28 [proceedings of the academy of [Jan., 



Placenticeras telifer (Morton). 



Aynmonites (elifer Morton, Am. Jour. Sci., XXIII, p. 290, 1833; Syn. Org. 

 Rem., 38, pi. 2, f. 7. 



Placenticeras syrtale (Morton). 



Aynvionites syrtcdis Morton, Syn. Org. Rem., pi. 16, figs. 1, 2. 

 Placenticeras syrtalis Hyatt, Mon. U. S. Geol. Sur., XLIV, 205, pi. 28, 

 figs. 1, 2, and pi. 27, f. 15. 



Protengonoceras gabbi (BOhm). 



Ammonites pedernalis Gabb, Pal. Calf. II, 258, pi. 35, figs. 1, la, 1869 (not 



V. Buch). 

 Engonoceras gabbi Bohm, Zeitschr. Deutsch. geol. GeselL, L, p. 197, 1898. 

 Protengonoceras gabbi Hyatt, Mon. U. S. Geol. Sur., XLIV, 153, pi. 17, f. 20. 



The specimen figm-ed by Hyatt, PL 17, f. 20, 



Sphenodiscus lentioularis var. mississippiensis Uyatt, Mon. U. S. Geol. Sur., XLIV, 77, pi. 

 9, f. 9, 1903. 



Eutrephoceras dekayi (Morton). 



Nautilus dekayi Morton, Am. Jour. Sci., XXIII, 291, 'pi. 8, f. 4, 1833. 



Specimen figured by Whitfield (pi. 37, f. 4). Type of Hyatt's 



genus Eutrephoceras {Proc. Am. Phil. Soc, XXXH, 555). 



Nautilus perlatus Morton, Syn. Org. Rem., 33, pi. 13, f. 4, 1831. 



This may prove to be a synonym of E. dekayi. 



Nautilus bryani Gabb, Proc. Acad. Nat. Sci., 1876, p. 277. 

 Hercoglossa paucifex (Cope). 



Attiria paucifex Cope, Proc. Acad. Nat. Sci., 1866, p. 34. 

 Type figured by A\liitfield (pi. 39, f. 1). 



Belemnitella americana (Morton). 



Belemnites americanus Morton, Am. Jour. Sci., XVII, 281, 1830; XVIII, 

 pi. 1, figs. 1-3, 1830; Jour. Acad. Nat. Sci., VI, 190, pi. 8, figs. 1-3, 1830. 



Variety A, Morton (Sy7i. Org. Rem., 34, pi. 1, fig. 3), is the type of 

 the var. suhfusiformis Whitfield (pi. 47, figs. 1,2). There is also the 

 type of var. "B," Morton {Syn. Org. Rem., 34, pi. 1, f. 3b). 



Belemnites (?) ambiguus Morton, Am. Jour. Sci., XVII, 281, 1830 ; XVIII, pi. l, figs. 4, 5, 18-30 ; 

 Jour. Acad. Nat. Sci., VI, 192, pi. 8, figs. 4, 5. 1830. 



CRUSTACEA. 



Callianassa mortoni Pilsbry, Proc. Acad. Nat. Sci., 1901. 112, pi. 1, figs. 1-6. 

 Hoploparia gabbi Pilsbry, Proc. Acad. Nat. Sci., 1901, 11.5, pi. 1, figs. 11-14. 

 Cancer whitfieldi Pilsbrj-, Proc. Acad. Nat. Sci., 1901, 118, pi. 1, f. 18. 

 Scalpellum conradi Gabb. Proc. Acad. Nat. Sci., 1876, 179, pi. V, flgs. 3a, b, 4. 



