14 BrLLKllN NO. .«, lIMTtLD SIATES NATIONAL MUSEUM. 



Hel'x leid'ji II. .s , H. & M., 1856, pi. iii, fi^'. 12 a, 6 394 



Am monites complexus, u. 8., H. &, M., 1856, pi. iv, fig. 1 a-/ 394-395 



Ammonites pcrcarinatun, d. 8., II. <fc M., 1856, pi iv, fti;. ■! a-c 396 



Ham.ites mortom. d. a., H. &. M., 1856, ])!. iv, figs. 3 a-c 396-397 



Ancyloceras ! nicolleUi. u. s., H. &. M., 1856, pi. iv, fig. 4 397-398 



BacuUtes ixatun anil B. compresnus, Say 398-391) 



BacuUtcs ovatun. Say. pi. v, tig 1, a-c ; \A. vi, tigs. 1-7 399-400 



BacuUtes compressus. Say, pi. v, figs. 2 a-b ; pi. vi, fig.s. 8-9 400-4J2 



BaeulUes grandin, u. s., H. & M., I83C, pi vii, flg. 1, 2 ; pi. viii, figs. 1, 2 ; pi. vi, fig. 10. . . . 402-403 



Th(! .saini^ paper coutains — 

 "Soctioa of iliH iuo!nl)«ra of the Cret.aceous formation as observed on the Missouri 



Kiver. and thence wesiwanl to the Mauvaises Terres 405 



List of fossils heretofore identified and described fioiu the Cretaceous formation of 



Nebraska 405 



List of species common to the Cretaceous formations of Nebraska and New .Tersey. . 406 



List of the new species of fossils described in the preceding paper 406 



In the additions and corrections - . . 411 



Fusus CGnstrictus is referred to the genus Buccinum. 



Hamites mortoni is regarded as belonging to the genus Ancyloceras as defined by Pictet. 



3. 



\D-:kk, V. 15., aud Hayden, F. V. Descriptiou.s of uew species of Gasteropoda, from 

 tbo Cretaceous foruiatiou of Nebraska Territory. <^Proc. Acad. Nat. Sci. Phila., 



vol. viii, pp. 63-69. 1856. Philadelphia, 18.57. 



* Page. 



Scalaria cerethi/onnis, n. s., M. & H., 1856 63 



Action subellipticiis, n. s., M. & H., 18.56 63-64 



Avalana subglobosa, n. s., M. &. H., 1856 64 



Natica? atnbigua, n. s., M. & H., 1856 64 



Natica occidenlahig, n. s., M. & H.. 18.56 64 



Satiea moreauensis, n. s., M. & H., 1856 64 



Turbo nebraticends, u. s., M. & H., 1850 64 



Turbo tenuilineatus, n. s., M. & H., 1856 .' 64-65 



liostellariabiangulata,-si.s.,'iA..Sc'B..,\ib^ 65 



Fusun dakotaensis, n. s., M. &. H., 1856 65 



FuKug galpinianus, n. s., M. & H.. 1856 65 



Fusus contortus, n. s., M. & H., 1856 65 



Fusus culbertsoiii, u. s., M. & H., 1856 66 



Fusus flexiiocostatus, n. s., M. & H., 1856 66 



Fusus newberri/i, u. s., M. & H., 1856 66 



Pyrvla bairdi, n. s., M. & H., 1856 66 



Fasciolaria cretacea, ii. s., M. &. H., 1856 66-67 



Fascinlaria buccinoides, n. s., M. & H., 1856 67 



Bucciimtii i nebrascensis, n. s., M. & II., 1856 67 



Capulus fragiiU, n. s., M. &. H., 1856 68 



/Jricio7». Mont fort 68 



Helcion sexsnlcatus, n. s.. M. & H., 1856 68 



Ilelciun palelliformis, n. s., M. & H., 1856 68 



Helcion alveolus, u. s., M. & H., 1856 68 



Ilelcion subovatus, u. s., M. & IL, 18;6 68 



Uelcioii earinatus, n. s., M. & II.. 1856 68-69 



Dentallum fragilis, u. s., M. &. II., 1856 69 



Bulla voli'aria, u.'s., M. &. II., 1836 69 



Bulla minor, n. s., M. & H.. 1856 69 



Bulla occidentalism n. s., M. & H., 1856 69 



Mkkk, F. IJ., and Hayokn, F. V. Descriptions of uew species of Gasteropoda and 

 Cephalopoda, from tiic Cretaceous formations of Nebraska Territory. < Proc. 

 Acad. Nat. Sci. Phila., vol. viii, pp. 70-72. 1856. Philadelphia, 1857. 



Page. 



Turrilella convejca, u. s.. M. & U., 18.57 70 



Turritclla moreauensix. u. ?».. M. & II., 1857 70 



