EXPLANATION OF PLATE II. 
TAPES MONTANENSIS. 
Fig. 1. View of the left valve, natural siz6... 6.1 cece cece cece ee cee cee rene cece cece ree ene e ene die aie weiseeei e's 
Fig. 2. The same enlarged, showing the nearly obsolete strix..... soxibateinleie Sia a! atepnpretsinaiss sisisies jiaswe svete s ciaie Ssieinaa 
SANGUINOLARIA OBLATA. 
Fig. 3. View of a left valve, natural size..... aiseeees eraieisee aa pea susmrelnigieemeeing’s oielvlcid| sinkisio’ Gece sLeceuns sSenesisins 
Fig. 4. View of the same, enlarged to show more distinctly the LOTW sice's sins tne Deus Sereee sedeSacectusearseiece 
MACTRA MAIA. 
Fig. 5. View of a left valve, enlarged, showing the general form of the shell, the impression left by the removal 
of the posterior lateral tooth, and the sinus of the pallial line... 2... 2... eee ee eee cones cece ee ce eeee 
THRACIA (CORIMYA) GRINNELLI. 
Fig. 6. View of the right side of the specimen........2-..-.--20+ -2-e ence uececetemeedatness se esieueGteeeteen 
Fig.7. Cardinal view of the same, showing the bending of the valves............---. sicedoemercedmaioes sieese 
GERVILLIA SPARSILIRATA. 
Fig. 8. View of the left side of the specimen described; the posterior end restored in outline........---...---- 
GRYPHEA PLANOCONVEXA. 
Fig. 9. Cardinal view of a very convex lower valve, showing the curved beak, which is truncated by attachment 
to some foreign substance... ...--- 1. ee ee nee eee eee ee eee ee acae Belniais > cine’ Cee Ves SEES Meee ees eseR eS 
Fig. 10. View of the exterior of same, showing the general form..... isu Skee dee ese dare tees tesa vesmsematen 
VANIKOROPSIS TOUMEYANA. 
Figs. 11 and 12. Views of the opposite sides of the specimen described, showing the characters of the shell; the 
latter figure showing the aperture as seen on the specimen broken and imperfect......---.---..------ 
Fig. 13. A restored figure, showing what would appear to be the form of the aperture when complete. The 
umbilicus is shown as seen in the specimen when turned more to the right than in fig. 12 -....-....-.- 
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