PLATE LXII. 



Figures niagnitied .5110 dianielerN. 



Page. 



Figs. 1, 2. Staukastp.um anatinum, , . . 152 



Fig. 3. Stalrastkum ankyroides, Var. Iiexiicenini, 151 



" 4. Stahrastrdm ankydoides, typical form, . . 150 



Figs. 5 7. Staukastrum iotanum, . . 150 



" 8-9. Staurastrum Pottsii, . . . 166 



" 10-12. Staurastrum megacanthum, 134 



' 13-15. Cosmarium protuberans, Var. rii-iiiiuULuiu, . . 91 



" 16, 17. Staukastrum forfkulatum, forma tetra^ona, . . 158 



'■ 18, 19. " forma trigona,, . 158 



" 20, 21. St.aurastrum Dickiei, front and end views. (Compare Plate 



LI, figs 5, 6), . . 135 



" 22, 23. Staurastrum aspinosb.v, . 157 



24-26. Staurastru.m monticulosuji, . 159 



27, 28. Staurastrum striolatum, . . 138 



" 29, 30. Staurastrum i,eptacanthum, Var. Iretroctocerum, . 166 



Fig. 31. Staurastruji elonsatum, Var. letragonum, 144 



Figs. 32-35. Staurastrum pseudopachyrhynchum, two front and two 



end view!', . 137 



" 36, 37. Cosmarium pseudobroomei, front and end view, . . 93 



