110 BULLETIN NO. 30, UNITED STATES NATIONAL MUSEUM. 



Page. 

 Lamellibranehiata. 



Pleriidce. 



1 Pogidonomyti, Bronn 92 



P.l fragosa, n. »., iMeek, 1877, pi. hi, figs. 8, 8 a 9^-93 



A viculojyeeten, McCoy 93 



A. catactvs, n. s., Meek, 1877, pi. iii, figs. 10, 10 a, and 10 6? 93-95 



A. utahensis, Meek, 1860, pi. ix, figs. 7, 7 a and 6 (and 7 c, and dt) 95-96 



A. occidanetis, u. 8., Meek, 1877, pi. xii, figs. 13, 13 a and b 96-97 



Cephalopoda. 

 Gonial iiidce. 



Goniatites, De Haan 98 



G. goniolobus, n. s.. Meek, 1877, pi. ix, figs. 5, 5 a.b 99-99 



L'PPEK TKIA6SIC 6PECIE8. 



Mollusca. 

 Brachiopoda. 

 Discinidce. 



Discina, Lamarck 99 



Discina. .sp. uudt., Meek, 1877, pi. x, figs. 3,3 a 99-100 



Lam ellib rancid a ta. 

 Pteriidce. 



Halohia, Bronn 100 



R.(DaoneUa) lommeli, Wissmann, 1841, pi. x, fig. 5 100-102 



Lueinidcf. 



Sphcera, Sowerby 102 



S.whitneyi, n. s.. Meek, 1877, pi. x, figs. 4, 4 a-c 102 



f Modiomorpka, H. & "W 



M.? ovata,n. s.. Meek, 1877, pi. x, figs. 1, 1 a 103 



M.? latm, n. s., Meek. 1877, pi. x, fig. 2 103-104 



Cephalopoda. 

 Orthoceratitidce. 



Orthoceras, Auct 104 



O.blakei, Gabb? 1864, pi. x, fig. 11 104-105 



AMMONITOID FORMS OF THE UPPER TRIAS OF NEVADA. 



Clydonitidce, n. f., Hyatt, 1877 107 



*Coroceras, n. g., Hyatt, 1877 .- 107-108 



Clydonites, Hauer 109 



C.lfevidorsatus, Ilauer, sp., I860, pi. x, fig. 7 109-110 



Trachycerafidce. 



iGyrnnotoceras, n. g., Hyatt, 1877 110-111 



O. rotelliforme, n. s., Meek, 1877, pi. x, figs. 9, and 9 a 111-113 



G. blakei, Gabb, sp., 18<)4, pi. x, figs. 10, 10 a-c, and pi. xi, figs. 6, 6 a 113-116 



Trachyceras, Laube 116 



T. whitneyi, Gabb, sp., 1804, pi. xi, figs. 3,3 a 116-118 



T. judicaricum, Mojsisovics, lSb9, pi. xi, ligs. 1, 1 o 118 



T. judicaricum, var. subasperum, Meek, 1877, pi. xi, figs. 2, 2 o and 6 118-119 



Arcestidce. 



Arcestes, Sue.ss 1 19-120 



A. ? perplanus, n. s.. Meek, 1877, pi. xi, figs. 7 and 7o 120-121 



A.gabbi, u. s.. Meek, 1877, pi. x. figs. 6, 6 a and b 121-123 



Physanoidce. 



I Acrochordiceras, u. g., Hyatt, 1877 124 



A.hyatti, n. s.. Meek, 1877, pi. xi, figs. 5 and 5 a 124-126 



Eutomoceras, n. g., Hyatt, 1877 126 



E. laubei, n. s.. Meek, 1877, pi. 10, figs. 8, 8 a 126-128 



Eiidiscnceras, n. g., Hyatt, 1877 128 



E.gabbi. n. a.. Meek, 1877, pi. xi, figs. 3 and 3 a 128-129 



JURAf-SIC BPEC1K8. 



MoUu8ca. 

 Lamellibranehiata. 

 Limidce. 



Lim,a, Brugui^re 130 



L. (Limatula) erecta, n. s.. Meek, 1877, pi. xii, fig. 2 130 



*K6pvs, a helmet; xepa?, a born. t a.KpoxopSu)v, a wart; icepo«, a hom. 



\yvnv6<;, iinki (1 ; iciro?, biick : (cepas, a horn. 



