Pig. 27. NAVICULA CIRCUMSECTA, Grun., CL, 1880, p. 42, UV. 



Schm. At., 3, f. 27.) 

 " 28. " POLYSTICTA, Grev., Calif., p. 28, 4, f. 12- Sclnn. At., 



3, f. 26. 

 Figs. L>9, 30. " TEKMIS, A. S., Schm. At., 45, f. 67, 71; V. H., 6, f. 12 



13; probably a var. of N. mesolepta. 

 " 31. " FELLICULOSA, Hilse., V. H., 14, f. 32; Fri^inlin />,-!- 



liculosa, Gran., 1860, 5, f. 18. 

 " 32. LANCEOLATA, Kg., K. B., p. 94, 28, f. 38; 30, f. 48, 



Schm. At., 47, f. 49; V. H., 8, f. 16, 17 ; Kg.'s form 



not W. S.'s. 

 " 33. " GLOBICEPS, Ralfs., V. H., A., f. 13. Figure perhaps 



rather large for an average size. 

 " 34. " RHYNCOCEPHALA, Kg.,K. B., p. 152, 30, f. 35; S. B. D., 



I, p. 47, 16, f. 132. Schm. At., 47, f. 28-32. 

 " 35. " PLACENTULA, Ehrb.., K. B., p. 94, 2S, f. 57, Lewis, W., 



M.D., 2, f. 7. A somewhat dubious form; Khrb., 



Kg. and Lewis do not quite agree. 

 " 36. " RECTANGULATA, Greg., D. C., p. 7. 1, f. 7; Donk., B. 



D., p. 66, 10, f. 5; V. H., A. S., f. 7. 

 " 37. ELONGATA, Grun., Schm. At., 50, f. 27-29, merely a 



form of N. viridis. 

 Figs. 38, 39. DECURRENS, Kg. K. B., p. 99, E. Mik., 11, f. 28 ; Schm. 



At., 45, f. 29, 30. 

 Fig. 40. " NUMMULARIA, Grev., CaL, p. 29, 4, f. 6 ; Schm. At., 70, 



f. 37, 38. 



" 41. " PAPULA, Grun., Schm. At., 7, f. 45-48. 



" 42. " LANOEOLATA, Kg. Same as Fig. 32. Kg.'s form has 



divergent striae ; W. S. has striae parallel. 



" 43. " . NUMMULARIA. Grev.. same as Fig. 40, larger form. 



Figs. 44, 45. SCULPTA, Ehrb., Mik., 10, 1, f. 5, a. b. Schm. At., 49, 



f. 46-48; V. H., 12, f. 1. 

 Fig. 46. " BOHEMICA, Ehrb., Mik., 10, 1, f. 4; Schm. At., 49, f. 



43-45. 



