32 BULLETIN NO. 30, UNITED STATES NATIONAL MUSEUM. 



Page. 

 iMmellibranehiata. 



PteriidcB (-Aviculidae) 27-30 



Pteriniirue (or Pt«rinia group) 28 



Pteriina (or Aviculnce) 28 



Melininte (Pcrna or Isognomon group) 28 



Pteriniince 30 



Myalina, Koninck, 1842 30-32 



Shell structure of Myalina arujulata, fig. — 31 



M.pemttenuata, M. & H., 1858, pi. i, figs. 12 o, 6 32 



M. svbquadrata, Shnmard, figs, a, b, p. 33 32-33 



OrassaUUidcB 34 



Pleurophorui, King, 1844 34-35 



Subgenus Oleidophonis, Hall, 1847 35 



P. occidentalu), M. cfe H., pi. i, figs. 11 a,b 35 



Anatinidce 36 



AUorisma, King, 1844 36-37 



A. sribeuneata, M. <t H. , 1858, pi. i, figs. 10 a, 6 37-38 



5ed^tPicHa, McCoy, 1844 38-40 



8. topekaensis ?, Shumard, 1858, figs, a, ft. p. 40 4(M1 



S.f concava, M. it H., 1858, pi. i, figs. 8 o, & 41 



S.f altirostrata, M. & H., 1858, pi. i, fig. 9 41-42 



* Ohcenomya, n. g.. Meek, 1865 42-43 



O. leavenworthensis, M. & H., 1858, pi. ii, figs. 1 O-c 43-44 



C. cooperi, M. & H., 1858, pi. ii, figs. 2 a, 6 44 



Qasteropoda. 

 Prosobranchiata. • 



RMpidoglossata. 

 Podophthalma. 



Pleurotomariidce 44-45 



Pleurotom aria, Defrance, 1826 45-46 



P.humero8a,M.&, H., 1858, pi. i, figs. 14 a, 6 46-47 



P. «i«btMrb!7iata, M. &H.,1858,pl.i, fig. 13 47 



CARBONIFRBOUS AGE. (PEBHIAN FEBIOD.) 



MoUutca. 

 Lamellibranchiata. 



Pectinidce 48 



Pectininoe 48 



Aviculo-pectinince • 49 



Avictdopectinirue 49 



Aviculopectcn, McCoy, 1851 49 



A. amplut, M. &; W., fig. — , p. 50 50 



Avieulopecten, ?, pi. ii, fig. 10 50 



A. macoyi, pi. ii, fig. 9 5(^1 



PteriidcR. 



Pteriniince 51 



Jfyaiina, Koninck, 1842 51 



Jf. o»ici<ioide«, M. & H., 1860, pi. ii, figs. 8 a-d 51-52 



M.permiana, Swallow, 1858, pi. ii, figs. 7 Or-c 62 



Pteriince. 



^umicroti*. Meek, 1864 53-54 



E.hawni, M. &. H.,pl. ii, figs. Sa-e, and fig. 1, p. 54 64-55 



Shell structure of £. curta. No. 2, p. — 54 



E.hawni var. ovata, pi. ii, figs. 5 a, b 55 



Mdininm. 



.Bateie«ia, King, 1848 57 



jB.pan-a,M.&H., 1858, pi. ii, figs. 12 a, 6 57 



Trigoniidce 57-58 



Schizoduf, King, 1846 58-59 



S.ovatiu.M.Sc H., 1858, pi. ii, figs. 11 a, b 59 



Nuculanidte 59-60 



Ntuntlanince 60 



MdUetincB 60 



*XatV<i>, to open or gape ; and mya. 



