PLATE XCIV. 



Figures magnified -500 diameters. 



i. COSCINODISCUS ELEGANS, Grev.. T. M. S., 1866, p. 3, 1, f. 6; 



Schm. At., 58, f. 7. Piscataway, Me. 

 2. SYMMETRICUS, Grev., T. M. S., 1861. p. 68, 8, f. 



2; Schm. At., 57. f. 25-27. Areolation, hex- 

 agonal. 

 3. " CONGA vus, Ehrb. Mik., 21, f. 4 ; 18, f. 38 ; Schm. 



At., 59, f. 16. Monterey. 

 Figs. 4, 5. COCCONEIFOKMIS, A. S. Monterey. Schm. At., 



58, f. 25, 26. 

 Fig. 6. RADIOLATUS, Ehrb. Mik., 39, 3, f. 18 ; 22, f. 4; 18, 



f. 36; K. B., 29, f. 91; Schm. At., 60, f. 11. 



Cellules rather too irregular and too radiate, 



H. L. S. 

 " 7. NODULIFER, Jan., or better C. RADIOLUS, var. 



nodulifer. Schm. At., 59, f. 20. Camp. Bay, 



Gal. 

 Figs. 8, 9. " SUBTILIS, Ehrb. Richmond, Virginia. 57, f. 



11, and 15, 16 vars. The latter with areolation 



somewhat larger. 

 Fig. 10. NITIDULUS, < Jrun. Camp. Bay. Schm. At., 58, 



f. 20. 



" ll. " RADIOLUS, Grim. Monterey. V. H., 132, f. 7. 



" 12. " CENTRALIS, Grun. ; not Ehrenberg's figure, 



which is very indefinite. Schm. At., 60, f. 12. 

 ' 13. " APICULATUS, (= perlbratus) Ehrb.; Schm. At., 



64, f. 5, 6. Richmond, Va. 



" 14. ACTINOCYCLTTS CURVATULUS, Janisch ; Schm. At., 57, f. 31. 

 " 15. COSCINODISCUS, NITIDULUS, Grun. Camp. Bay. Schm. At., 58, 



f. 21. 



" 16. " MARGINATO-LINEATUS, A. S., Schlll. At., 59, f. 



33. Camp. Bank. 



17. ROTULA, Grnnow ; Schm. At., 57, f. 6, 7 ; Camp. 



Bay. 



18. LEWISIANTTS, Grev.; Schm. At., 66, f. 12; T. M. 



S., 1S06, p. 78, 8, f. 8-10. Rappahannock, Va. 

 According to Greville the granules have a 

 distinct radiate character. 



19. STELLIGER, Grun. Camp. Bay. Schm. At., 



58, f. 10. 

 " 20. MINOR, Ehrb. Abb.., 1839, p. 147, 3, f. 2 ; K. B., 



1, f. 12, 13; Schm. At., 58, f. 39. 40. 

 Figs. 21, 26. MARGINULATUS, var. curvato-striata; V. H., 94, 



f. 32. 

 NITIIHTHTS, Ureg. Camp. B v ay. Schm. At., 58, 



f. 17. 

 " 23. var., Schm. At., 58, f. 19. 



24. XOTTINGHAMENSTS, Grun. Maryland. V. H., 



129, f. 2. 

 MARGINULATUS, var. Campeachiaua, Grun.; V. 



H., 94, f. 33. 



MARGINULATUS, Grun.; var. Stellulifera, Grun. 

 Camp. Bay. V. H., 94, f. 34. 



