104 BULLETIN NO. 30, UNITED STATES NATIONAL MUSEUM. 



Page. 

 Ancyloceratidce. 



Anci/loceras, d'Orbiguy, 1841 408-400 



A. ? uncum, il. & IT., 1858. pi. xxi, figs. 1 a, 6 409-+10 



Ptychoceralidce. 



Ptychoceras, d'Orbiguy, 1841 410-412 



P. mortoni. M. &. n., 1857, pi. xx, figs. 4, a-c 412-413 



ScaphUidce. 



Scaphites, Paikinson, 1811 413-418 



Macroscaphites, Meek 414 



ticaphites, Parkinson 414 



Diseoscaphites. Meek, 1872 15 



S. larvcefvrniis, M. &. H., 1856, pi. vi, figs. 6 a-c 418-419 



S. warreni, M. & H.. 1860, pi. vi, flg. 5 and figs. 61, 62, p. 4S1 420-42:; 



5. i'«r»u/c>rmi«, M. & H., 1862, pi. vi, figs. 4 a, 6 423-425 



S. ventricoms, M. & H., 1862, pi. vi, figs. 7 a, b, and figs. 8a,b 425-426 



/S. nodosus var. brcvis, pi. xxv, figs. 1 Of-c 426^28 



S. nodogun var. quadrangtdaris, pi. xxv, figs. 3 o-e, 2 a-c and fig. 4 428-420 



* S. nodogus var. plenns, pi. xxvi, figs. 1 a-c 429-430 



S- {IHiiCo>-ca2}hites) conradi, Morton, .sp., 1834, pi. xxxvi, figs. 2 o-« 430-432 



S. {Diseoscaphites) conradi, \ht. gulosus, Morton, 1834, pi. xxxvi, fig. 1 432-433 



S. {Diseoscaphites) conradi. var. intermediits, pi. xxxiv, figs. 3 Or-c 433-t35 



S. {Diseoscaphites) nieoletii, Morton, sp., 1841, pi. xxxiv, figs. 4 a-c and 2 a-b. . . 435-4.36 



S. { Discoseaphites) cheyennensis, Owen, sp., 1852, pi. xxxv, figs. 3 a-i 437-441 



S. (Diseoscaphites) abyssinus, Morton, sp., 1841, pi. xxxv, figs. 2 a,b and 4 441^143 



S. (Diseoscaphites) mandanensis, Morton, .«p.. 1841, pi. xxxv, figs. 1 a-e 443-444 



Ammonitidw. 



Ammonites, Brug., 1789 445-447 



A. complexus, M. & M., 1854, pi. xxiv, figs. 1 a-c 447-448 



Mortoniceras, n. g.. Meek, 1876 448—449 



M. shoshonense. Meek, pi. vi, figs. 3 a,e ana 6 & . . 449-4.50 



M. ? vermilionense, M. & H., 1860, pi. vii, fig. 2 a, 6 450-452 



Prionocyclvs. Meek, 1872 452-455 



Prionotropis, Meek '. 453 



P. {Prionotropis) woolgari, Mantell, sp., 1822, pi. vii, figs. 1 a-h, and pi. vi, fig. 2 455-457 



Phylloceras. Suess, 1865 458 



P. > haUi, M. &. H., 1856, pi. xxiv, figs. Z a-c and fig. 64, p. 458 458-46J 



Placentieeras, Meek, 1870 ; 462-464 



Sphevodiscus, Meek, 1872 . - . 463 



P. placenta, DiKay, sp., 1828, pi. xxiv, figs. 2 a, 6 and fig. 65, p. 466 465-468 



P. placenta vur. intercalare, pi. xxiii, figs. 1 a-c .... 468-472 



P. (Sphenodiscus) lenticulare, Owen, sp., 1852, pi. xxxiv, figs. 1 a-c, tig. 66, p. 473 . 473-476 

 Turrilitidcf. 



Heteroceras. d'Orbigny, 1849 477-478 



H. .' cochleatum, H. & M., pi. xxii, figs. 2 a, 6 .' . 478-479 



H. ! nebraseense, M. &. H., 1856, pi. xxii, figs. 1 a-c . 480-481 



H.tortum,U & 11., 1858, pi. xxii, figs. 4 m-c 481-482 



H. > wnbilieatwii M. & H., 1858, pi. xxii, fig. 5 , 482-483 



H. ! cheyetmense, M. & H., 1856, pi. xxi, figs. 2 a,b 483-484 



H.? angulatum, M. & H., 1860, pi. xxi, figs. 3 a-c 484-485 



Helicoeeras, dOrbigny , 1840 485-487 



-Patoceras, Meek 485 



Ilelicoceras mortoni var. tenuieostatuvi, pi. xxii, fig.s. 3 a-c 487-4ti9 



NautiUdcK. 



Nautilus, Linnaeus, 17.58 . . 489-495 



rcmnoc/K7«s, McCoy, 1844 49C 



Trematodiscus, M. & W., 1861 491 



Z>iACi(ci( (De Hann). McCoy, 1825 491 



ifolenochiliis, M. & W., 1870 {—Oryptoeeras, d'Orbigny) 491 



Hercoglossa. Conrad, 1866 (—Aganides, Montfort?) ■ 491 



Pseudunautilus, Meek 491 



N. dekayi, Morton, 1834, pi. xxvii, figs. 1 a-e and fig. 67, p. 496 496-498 



X. dekayi var. moanoaensis, pi. xxvii, figs. 2 a-«. 498 



N.elegans, Sowerby, 1816, pi. viii, figs. 2 a-c 499-501 



• Traro?, a path : 'cepas, a hom. 



