PLATE LVII. 



Figures magnified 500 diameters. 



Figs. 1-5. MELOSIRA NUMMULOIDES, Ag. ; K. B., 3, f. 3; 8. B. D., 49, f. 



329; Prit.. p. 816, 5, f. 64; 11, f. 14; Abh., 1870, 

 2, f. 67. M. moniliformis, Kg. This name was 

 given by Keitzing, but others applied it indis- 

 criminately to Borreri, nnmmuloides, salina, 

 discigera, etc. It is of no value. 



Fig. 6. CROTONENSIS, Bail., = crenulata, Kg. K. B., 2, f. 



8; V. H., 88, f. 3-5. 



Figs. 7-9. GRANULATA, L. W. Bail. ; B. J. N. H., p. 332, 1, f. 



7, V. H., 87, f. 10-12, = Mel. punctata, = Gallio- 

 nella granulata ; G. marchioa; procera ; tener- 

 rima. 



Fig. 10. AMERICANA, Rab. Of very doubtful value. No 



one able to tell what this is. 



Figs. 11-14. VARIANS, Ag.; A. X. H., 1843, p. 357, 9, f. 5; K. B., 



2, f. 10; S. B. D., 51, f. 332; V. H., 85, f. 10-15. 



Fig. 15. VARIANS, Fig. from Rab., S. D. 



Figs. 16-20. CRENULATA, Bail. ; IS, var. laevis ; 19, 20, var. 



tenuis. Compare Fig. <i. 

 " 21, 22. GRANULATA, Bail. Vide Figs. 7-9. 



23-25, 28. SCALARIS, Grim.; V. H., 86, f. 30. 



" 26, 27, 29. SPIRALIS, Kg.; V. H., 87, f. 19-22; Sm. Sp. T., No. 



231, = vars. of granulata. 



" 30-32, 36. DISTANS, Kg. ; K. B., 2, f. 12; S. B. D., 61, f. 385; 



Rab. S. D., 2, f. 9; V. H., 86, f. 21-23. 



Fig. 33. GRANULATA, var. == M. carconeusis, Grim. ; V. 



H., 87, f. 27. 



Figs. 34, 35. SCULPTA, K. ; V. H., 91, f. 13, 14, = Tthosira 



marina. Side and front views. 



