PLATE LIII. 



Figures magnified 50() diameters. 



Pare. 



"Figs. 1, 2. Staubastrum Bieneanum, Var. ellipticnm, . 137 



" 3,4.. StAUEASTBUM MUEICATDM, . 140 



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



" 7, 8. Statjbastrdm aspeeum, . 140 



" 9, 10. Staurasteum polymoephom, ... . 139 



" 11-13, staurastenm boteophilum, . 145 



•' 14, is. staneastrum py6maeum, . .141 



'■ 16-19. " '' Var. truncatiim, . 141 



" 20,21. " " Var. rhomboides, . 141 



" 22, 23. stanrasteum silatatum, . . 142 



" 24, 2.5. Staurasteum polymorphum, . . . . .139 



" 26-29. Staurastrum ceenulatum, 140 



" 30, 31. Staubastrum cyrtoceeum, . . . 142 



" 32, 33. " " Var. pentacladnm minor, . 143 



" 34, 35. ' " pentacladum major, 143 



" 36, 37. Staubastrum paradoxum, . . . 143 



" 38-42. Staueasteum arachne, . . . 143 



" 43, 44. Staurastrum comptum, 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. Staubastrum Haaboblibnse, front and two en(i views, 147 



" 54, 55. Staurastrum pascicui^oides, front and end views, . . 144 



