106 BULLETIN NO. 30, UNITED STATES NATIONAL MUSEUM. 



Page. 



Folyrhytis, Meek 532 



Bulimnea, Haldeman, 1842 532 



Liniiwphy.sa. Fit/inger, 18.'!3 {=^Stagnicola, Loach & Oalba, Schranck) 533 



Ompluscola, Kaf. {=^Leptoliinnea, Swainson) 533 



Acella. Haldeman, 1842 533 



PlenroUmnaa, Meek, 1866 533 



L. (Pleurolimncea) tenuicostata, M. & H., 18.>6, pi. xliv, figs. 13 a-c 534 



Planorbis, Miiller, 1770 534-536 



Helisoma, Swaiusoii, 184U 635 



Planorbella, UalAi^man. 1842 5.36 



Taphim, H. & A. Adaui.s, 1856 536 



Menetug, II. & A. Adams, 1856 (^:zAnisus, Beck, not Fitz.) 536 



Anisiis, Fitzinger, 1833 (=Tropidiscus, Stein.) 536 



Bathyotnphalus, Agassiz, 1837 {:=Spirorbis, Swainaon, not Lamarck) 536 



Gyraulus, AgRnsiz {r=Xautilina, Stein.) 536 



P. convolutus, M. & H., 1856, pi. xlii, figs. 12 a,b 536-537 



P. convolutus viir., pi. xlii, figs. 11 o-e 538 



P. (Bathyomphalus) planoconvexus. M. & H., 1857, pi. xliv, flgs. 9 a-c 538-539 



P. {Bathyomphalus} amplexun, M. & H., 1857, pi ixii, figs. 16 a-« 539 



PhysidcB. 



Buliiius, O. F. Miiller, 1 781 540 



B. subelongatm, M. & H., 1856, pi. Ixii, figs. 13 a,b . 540-511 



B. longiusculus, M. & U., 1856, pi. xliii, figs. 16 a, b 541-542 



B. rhomboideus, M. & H.. 1856, pi. xliii. fig. 17 542 



Ancylidce. 



Acrolnxus.Bec^, 1S37 54.< 



A.minutus, M &H., 1836, pi. xliv, fig. 10 543-544 



Titrinidce. 



Vitrina, Drapernaud, 1801 544 



v.? obliqua, M. & 11., 1857, pi. xlii, figs. 10 a, b 545 



Hyalina. F6ru.ssac. 1819 545-547 



H. 1 occidentalis, M. & H., 1857, pi. xlii, flgs. 6 a-d 547-548 



H.? eoansi, M. & H.,1860. figs. (;8, 69, 70, p. 548 548-549 



Helicidce. 



Helix, Unoieus, 1758 549-551 



Galaxias, Beck, 1837 549 



Ca?n(»n«, Albers, 1 850 550 



Belix vetusta, M. & H., 1860, pi. xlii, flgs. 7 o, 6 552 



Thaumastus, Albei-s, 1860 553 



T. limnceiformis, M. & H.. 1856, pi. xliv, flgs. 8, a-d 553-554 



Columna, Perry, 181 1 5.>4 



Jihodea, H. & A. Adam.s, 1855 555 



Columna teres, M. &. H., 1856, pi. xliv, flgs. 11 a, 6 555-556 



O. vermicula, M. & H., 1856, pi. xliv, flgs. 12 a, 6 556-5.=>7 



O. vermicula var. contraria, Meek, 1866 557 



Pectinibranchiata . 

 Cerithiidce. 



Cerithidea, Swaiuson, 1840 558 



Pirenella, Gray, 1847 558 



Cerithidea (Pirenella ?) nebrascensis, M. & H., 1856, pi. xliii, figs. 9 a-c (bis) 559 



Ceriphasiidce. 



Goniohaxis, Lea, 1862 , .')60-561 



G. convexa, M. & H., 18.56, pi. xlii. figs. 2 a, b, and figs. 71, p. 562 and 72, p. 563. . . 562-563 



G. convexa var. »'wi/»re«»a,.M. & H., 1857, pi. xlii, flgs. 2 c, d 563-.564 



G. inveiiusta. M. <fc IL. 1857, i>l. xlii, figs. 1 a-e 564-.565 



G. nebrascensis, M. &, 11., 1856, pi. xliii, flgs. 12 a-h, and fig. 73, p. 565 565-566 



G. tenuicarinata, M. & H., 1857, pi. xliii, figs. 14 a-c 566-567 



G. svblarvis. M. & 11., 18.57, pi. xlii. figs. 5a,b 567 



6. 1 omitta M. & II.. 1857, pi. xlii, fig.-*. 4 a-c 568 



6 grueilfnta. Meek, pi. xlii, fig. 3 and fig. 74, p. 569 568-569 



a.? mhtirrtuosa, M. & II. 1857, pi. xlii, flgs. 17, a-b, and flgs. 75, 76, p. 569 5H9-570 



JUssoidc. * 



Hi/drobia, Uartmann, 1821 571 



//. anthonyi, M. & H.. 1S56, pi. xliii, figs. 10 n-d 571-572 



II M'(7rrc»ia?ia, M. & H., 1857, pi. xhii. figs. 1 a-e 572-573 



