112 BULLETIN NO. 30, UNITED STATES NATIONAL MUSEUM. 



Page. 

 Siphonariida-. 



/ AHi»»in.»/on, M. <Sc H 162 



A. scx8iitcalus,'Si. &H.? 1856, figa. 4 and 5, p. 162 162 



FOSSILS OF THE BEAR KIVER FRESH OR nRACKISIl WATER BEDS. 



MoUusca. 

 Lamellibranch lata. 



Unionidtp. 



Unio, Retzius 164 



r. vettuittis, Meek, 1860, pi. x vi, figs. 5, 5 n-c 164-165 



r. 6ei«ipiica<M«, Meek, 1870, pi. xvi, figs. 4, 4 a 165-167 



Cyretiida: 



Oorbicula, Benson 167 



G. (Velorilina) durkeei. Meek, 1870, pi. xvi, figs. 6 a-g 167-170 



Corbulidce. 



Corbula. Bnig 170 



C. (Anisorhi/nchus) pyriformis.Meei, IS60,^\. xvii, figs. 2, 2 a-d 170-174 



C. (Anigorln/nclnif! f) engelmdnni. Meek, 1860, pi. xvii, figs. 1, 1 o 174-175 



Oaateropuda. 



Aririciilidcp. 



RhyHphorx(s,Mee^, 1873 175 



R. priscxis. Meek, 1860, pi. xvii, figs. 6 .nnd 6 (X 17.1-176 



Ceriphasiido'. 

 PyrguUfera humerosa, Meek, l(-6(', pi. xvii, figs. 19, 19 a, and fig. 6 , p. 177 176-178 



Tiviparido'. 



Viviparus. Montfort 178 



r. conradi, Til. & H., 1856, pi. xvii, flg.s. 18,18 a 178-179 



Oam/irfoHio, Rafine.sqne . 179 



C. macrospira. Meek ? 1872, pi. xvii, figs. 17 a, 6 179-181 



Oampeloma (undt. sp.), Meek, 1877, pi. xvii, figs. 15 a, b, and fig. 16 a-c 181 



Limnandte. 



Limiuea, Lamarck 181 



//. (Limnophysa) nitidula, Meek, 1860. pi. xvii, figs. 5, 5 a 181-182 



SPECIES OF UNDOUBTED TERTIARY AGE. 



Mollusca. 

 LameUibranchiata. 



CyrenidoB. 



Sphcerium, Scopoli. 



S. rw(7o«M)H, Meek, 1870, pi. xvi, figs. 2, 2 a, b 182-183 



S. ? idaJioense, Meek, 1870, pi. xvi, fig. 1 , 1 n • 183-1 84 



Unionidcp. 



Unio, Retzius 184 



U. haydeni, Meek, 1860, pi. xvi, figs. 3, 3 a, 6 184-185 



Gastero])oda. 



Litnncnda: 



A ncylus, G eotfroy 186 



A. undulafiis, Meek, 1870, pi. xvii, figs. 12 a, b 186 



Garinifex, Biuney 187 



Subgenus Yirrticifex, Meek, 1870 187 



C. (Vorticifex) binneyi, Meek, 1870, pi. xvii, figs. 11, 11 a 187-188 



C. (ror«!Ci/ej) ?n/o«i, Meek, 1870, pi. xvii, figs. 10, 10 a-c 188-189 



J'lnnorbis. Gwttard 189 



' r. «pec«a6!7is, Meek, 1860, pi. xvii, figs. 13, 13 a-/ 189 



P. spectabilix var. utahengis, Meek, 1860, pi. xvii, figs. 14, 14 a-c 190-191 



Ziiwinff'a, Lamarck 191 



L. {Limnophysn) vetusto, Meek, 1860, pi. xvii, figs. 4, 4 a,b 191 



L. simUlft, Meik, 1860, i)l. xvii, figs. 3, 3 a 191-192 



L. {Pol!irhytis)kingii.u. s.. Meek, 1877, figs. 6 and 7, p. 192 192-193 



CeriphasUdm. 



Gonuibaitig, hi-.\ 198 



O. tfinipsoiii. Meek, 1800, pi. xvii, figs. 7,7 a-d 193-195 



Melaniidd/. 



Meiaiiia, A\\ct ....'. 195 



M. I HCiilptilis. Meek, 1870, pi. xvii, fig. 8 19.5-196 



M. f giibgculptilig, Meek, 1870. pi. xvii, fig. 9 196-197 



