104 BULLKTIN NO. .SO, UNITED STATES NATIONAL MUSEUM. 



Page. 

 Ancyloceralidce. 



Ancyluceras. dOrbigny, 1841 .'.... 408-409 



A. ' inicinii. M. & H., 1858. pi. xxi, figs. 1 0,6 409-410 



Ptychoceralida. 



rtycliucerag, d'Oibiguy, 1841 410-412 



P. mortoni. M. & II., 1857, pi. xx, figs. 4, a-e 412-413 



Scapliitidce. 



Scaphiteg, Paikiu.sou, 1811 41.3-418 



itacroscaphiUn. Meek 414 



Scaphites, Paikinsou 414 



DUconcaphileg. Meek, 1872 15 



S. larvceformU, M. & H., 1856, pi. vi, figs. 6 o-c 418-U9 



S.warreni. M. ic U.. 1860, pi. vi, fig. 5 and figs. 01, 62, p. 421 420-423 



S. vermi/ormig, M. & H.. 1862, pi. vi, figs, i a,b 423-425 



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



S. nodosxig var. hrevis, pi. xxv, figs. 1 a-c 426-128 



S. nodosug var. quadrangular ig, pi. xxv, figs. 3 a-c, 2 a-c and fig. 4 428-429 



S nodogiig var. plenug, pi xx vi, figs. 1 a-c 429-4.30 



S. (Digcotcaphiteg) conradi. Morton, .sp., 1834, pi. xxwi, figs. 2 a-e 4.30-432 



S. (Digcoscaphitex) cimradi, vav.gidosug, Morton, 1834, pi. xxxvi, fig. 1 4.32-433 



<S. (Discogcaphiteg) conradi. var. iniermediug, pi. xxxiv, figs. 3 a-c 433-435 



S. ( Digcoscaphiteg) nicoletii, Morton, sp.. 1841, pi. xxxiv, figs. 4 a-c and 2 a-b.. . 435-136 



S. {Digcogcaphi'eg) cheyennensig, Owen, sp., 1852, pi. xxxv, figs. 3 a-i 437-441 



/S. { Digcogcaphiteg) abygginug. Morton, sj).. 1841, pi. xxxv, figs. 2 a, b and 4 441-443 



S. {Digcogcaphiteg) mandanetigis, Morton, sp., 1841, pi. xxxv, figs. 1 a-c 443-444 



Aminoyiitidix. 



Ammoniteg, Bnig., 1789 445-447 



A. complexus, 11. & M., 1854, pi. xxiv, figs. 1 a-c 447-448 



Mortonicerag. n. g., Meek, 1876 448-449 



M. ghoghonenge. Meek, pi. vi, figs. 3 o, c antt 6 6 449-450 



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



Prionocyclus. Meek, 1872 452-455 



Prionotropig, Meek ... 453 



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



Phyllncerag. Suess, 1865 453 



P. > haUi, M. (t H., 1856, pi. xxiv, figs. 3 a-c and fig. 64, p. 458 458-46J 



Placendceras, ileek, 1870 462-464 



Sp/i«->iodi«c«*, Meek, 1872 463 



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



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



P. (Sphenodigciig) lenticulare, Owen, sp., 1852, pi. xxxiv, figs. I a-c, fig.66, p. 473 . 473-476 

 Tltrrilitidce. 



Iletfrocerag. dOrbigny, 1849 477-478 



H. ! cochleatnw. H. &. M., pi. x.\ii, tigs. 2a,b 478-479 



IT. .' nf6r«*cen*?, M. & H., 1856, pi. xxii. tigs. 1 a-c 480-481 



H.tortuvi,hl & n., 1858, pi. xxii, figs. 4 ^-0 ...481-482 



H..' u'libilicatum M. &. U., 1858, pi. xxii, tig. 5 482-483 



H. .' cheyennenge, M. & H.. 1850, pi. xxi, tig^. 2 a, 6 483-484 



H. ? angxdatum. M. & H., 1860, pi. xxi, figs. 3 a-c 484-48.J 



Helicocerag, d Orbiguy . 1840 485-487 



-Patocerag. Mt-ek .-. 485 



Helicocerag mortoni var. tenuicogtatum . pi. .xxii, figs. 3 a-c 487-489 



NautilidtK. 



,Va«tiii/«, Linna-us, 1758 489^95 



Temnoc/iiiHS, MrCoy, 1844 49t 



Treinatndigciig. },i. & W., \mi 491 



/>M(Ci?f<( (De Haiin). McCoy, 1825 491 



Holenockilug, M. & W.. 1870 {= Oryptucerag. dOrbigny) . 491 



Hercoglogsa. Conrad, 1866 {=Aganideg, Mont fort 491 



Pgeudonautilug. Mi-ek 491 



.v. d«A-ai/i, Morton. 1834, pi xxvii, figs. 1 a-c and fig. 67, p. 496 496-498 



\. dekayi var. moanuaengig, pi. xxvii, figs. 2 o-e 498 



K.elegang, Sowerby. 1816, pi viii, figs. 2 a-i: 499-501 



' iraTot. a path ; <ccpaf , a hom. 



