PLATE XCVI. 

 Figures magnified 500 diameters. 



Figs. 1, 2. BIDDULPHIA PULCHELLA, Gray. A front and a lateral view. 



(Denticella Bid<!ulj>/iia, Ehrb.; Biddulphia Lo- 



cularis, Kutz.) Camp. Bank. V. H., 97, f. 1; 



Schni. At., 118, f. 26-29. 



Fig. 3. " PULCHELLA, Gray.; a lateral view. 



Figs. 4, 5. EDWAKDSII, (front and lateral view) ; V. H., 100, 



f. 9, 10. Only a prickly form of B. Roperiana, 



Grev.; M. J., 1859, p. 163, 7, f. 11-13. 



Fig. 6. LONGICRUCIS, Grev.; M. J., 1859, p. 163, 7. f. 10. 



Figs. 7, 8. SETICULOSA, Gran.; Virginia. V. H., 101, f. 7, 8. 



" 9, 10, 11. AUBITA, Lyngb.; V. H., 98, f. 4-9: S. B. IX, 45, f. 



319. 



Fig. 12. " LONGISPINA, Grun.; St. Monica. V. H., 102, f. 6. 



Figs. 13, 14. KETICULATA, V. H., 102, f! 1, 2; Roper, T. M. S., 



1859, p. 14, 2, f. 13, 17; Schm. At., 78, f. 21-23; 



84, f. 9-16 ; 85, f. 8. 



