34 BULLETIN NO. 30, UNITED STATES' NATIONAL MUSEUM. 



Page. 



Macrodontince 88 



Axinince 88 



Macrodontince 89 



Grammatodon,'M.. & H., 1858 89 



G. iHor««*M», M. &H., 1858, pi. iii, figs. 9, 9 a, 9 6 90 



Unionidce 90-91 



Unio, llotzms,\lHS 92 



77. nwcrtJis, M. & H., 1«58, pi. iii, figs. 13 O-c 92-93 



Crassatellidce 93 



As«ar«e, Sowerby, 1816 93-94 



J.. /mffais, M.&n., 1860, pi. iv, fig. 7 94 



A. inornata, M. & H.. 1860, pi. i ii, figs. 12 a, 6 94 



Tancrediidce 95 



Tancrcdirt, Lycett, 1850 95-96 



T. warrenana,U.& II., I860, pi. iii, fig. 7 96 



T.? (p^jufaicmHs, M. & H., 1860, pi. iii, fig. 8 96-97 



Cardiidce , 97 



Frotocardia, Beyrich, 1845 97-98 



P.sAttmardi, M. &H.,1860, fig8.A,Bonp.98 98-99 



Anatinido) 99 



Myacites (Schlot.), Munster, 1840 99-100 



Jf. »ic?*ra«cc?ms, M. & H., 1860, pi. iv, fig. 5 100-101 



M. suhellipticus, M. & H., 1858, pi. iv, figs. 6 a-c 101 



rAracin, Lc:ich, 1819 101-102 



T.f »ublc^ns,M. & II., 1860, pi. iv, figs. 4, 4 a 102 



T. ? arcwata, M. & H., 1800, pi. iv, fig. 8 102 



Pftoiadojnj/a, Sowerby, 1823 102-103 



Section I. — Species without a circumscribed cardinal area. 



Multicostatce, Agassiz. (Jurassic and Cretaceous.) 

 TrigonatcK, Agassiz. (Cretaceous, Tertiary, and Recent.) 

 Bucardince, Agassiz. (Lias to Tertiary.) 



Section II. — Species with a circumscribed cardinal area. 



Flahellatce, Agassiz. (Jurassic.) 

 OvaJcs, Ag;is«iz. (Jurassic.) 

 Oardissoides, Agassiz. (Jurassic.) 



Pholadomya huitiilis, M. & H. , 1860, pi. iv, figs. 3, a, 6 104 



Gasteropoda. 

 Pulmonifera. 

 Inopercidata. 

 lAinnophila. 



Limnceidm 105-106 



Idmnceince 105 



Physinat 105 



Planorbince 105 



Planorbis, Miiller, 1774 106 



Planorbella, Haldeman 106 



Helisoma, S wainson 107 



Taphius, H. & A. Adams 107 



Menetus, H. & A.Adams 107 



Anisus, Fitziuger 107 



liathyomphalus, Agassiz {—Spirorbis, Swainson, not Lamk.) 107 



Oijraulus, Agassiz {:=Nautilina, Stoiu) 107 



Planorbis veternus, M. & H. , 1860, pi. iv, figs. 1 & 1 a, 6 107 



Prosobranchia ta . 

 Biphtdoglossa t a . 

 Podopthalma. 



Neritidoi 108 



NeriteUa, Huuapbrey, 1797 108-109 



N.nebrascensis, M. &H., 1861, figs.— , on p. 109 109-110 



C'yclobranchia ta . 



Dentaliidie 110 



Dentalium, Lin., 1740 Ill 



D. subquadratiim, Meek, 1860, fig. —, p.lU 111 



Ctenobranchiata {—Pectinibranchiata). 



