PLATE LIV. 

 Figures magnified 500 diameters. 



Pagb 



Fig. 1. Staurastrum oyrtocerum, Var. major, end view, . 142 



" 2. " " Var. major, front view, . 142 



Figs. 3-5. Staurastrum macrocbrcm, three views, . . .148 



" 6, 7. Staurastrum cerastes, front and end views, . 147 



" 8, 9. Staurastrum odontodum, front and end views, . 148 



" 10, 11. Staurastrum Ophiura, front and end views, . 147 



" 12, 13, 14. Staurastrum coronulatum, Var. Floridense, 149 



Fig. 15. Staurastrum pentacladum, front and end views, . 149 



Figs. 16, 17. Staurastrum gracile, front and end views. , . 147 



