PLATE XLII. 



Figures magnified 500 diameters 



Page. 



Figs. 1, 2. Staurastrum Bieneanum, Var. ellipticum, . . .121 



" .">, 4. Staurastrum muricatum, ..... 127 



5, 6. " " Var. . . . .127 



Fig. 7. STAURASTRUM wkki si, .... 127 



Figs. 9, 10. Staurastrum polymorphum, .... L26 



11-13. Staurastrum botrophilum, .... 131 



" 14, 1"'. Staurastrum pygmaeum, ..... 128 



" lti 19. Var. truncatum, . . . 128 



2n. 21. " " Var. rhomboides, . . .128 



22.2.".. Staurastrum silatatum, ..... 128 



" 24, 25. Staurastrum polymorphum, ..... 126 



" 26 29. Staurastrum crenulatum, .... 126 



30,31. Staurastrum cyrtocerum, ..... 128 



32,33. " Var. pentacerum, minor, 12'.' 



.">4. :'"). " pentacerum major, . 129 



" 36,37. Staurastrum paradoxum, ..... 129 



" 38 12. Staurastrum crachne, . ..... 129 



" 43, H. Staurastrum comptum, front and end views, . . L29 



" !"), 16. '" " Var. major, front ami end views, . 129 



" 17,48. Staurastrum it-hum. ..... 130 



49, 50. " -mailer variety, two views, . . 130 



" r>i 53. Staurastrum Haaboeliense, front and two end views, . 131 



" 54, 55. v l UJRASTRUM FAS< I' i LOIDES, front and eml vieu-, , , 130 



