PLATK 1,1 II. 



Figures niiiiniiiiecl .~>00 diameters. 



I',\(;K. 



Figs. 1, 2. STAURASTRUM BIENEANUM, Var. elliptic-urn, . . . 137 



" 3,4. STAURASTRUM MURICATUM, . . . . 140 



" 5,6. " " Var.. . . .140 



" 7, 8. STAURASTRUM ASPERUM, . . . . .140 



" 9, 10. STAURASTRUM POLYMORPHISM, ..... 139 



" 11-13. STAURASTRUM BOTROPHILUM, . . . . 14") 



' 14, 1ft. STAURASTRUM PYGMAEUM, . . . . .111 



" 16-19. " " Var. tnincatiiin, . 141 



" 20,21. " " Var. rliomlioides, . . .141 



" 22, 23. STAURASTRUM SILATATUM, . . . . .142 



" 24, 25. STAURASTKUM POLYMORPHISM, . . . . .1311 



" 26-29. STAURASTRUM (;I:KNULATUM, . . . . 140 



" 30, 31. STAURASTRUM CYRTOCKRUM, ..... 142 



" 32,33. " " Var. pontaoladinn minor, . 11:'. 



" 34,35. ' " pentadndnm major, . .143 



" 3(5, 37. STAURASTRUM PARADOXUM, . . . . 143 



" 38-42. STAURASTRUM ARACHNE, . . . . .14:: 



" 43, 44. STAURASTRUM COMITUM, front and end views, . . 143 



" 45, 46. " " Var. major, front and end views, . 143 



" 47, 48. STAURASTRUM PUSILLUM, . ... 1 44 



" 49,50. " smaller variety, two views, . .144 



" 51-53. STAURASTRUM HAABOELIENSK, t'nnii and iwnend views-, . 1 17 



" 54,55. STAURASTRUM FASCICULOIDKS, front and end views, . . 144 



