PLATE XLIII. 



Figures magnified 500 diameters. 



Page. 



Fip. 1. - kURASTRUW i vi:i", brum, \' ;ir . major, end view, . 129 



" 2. " " Var. major, from" view, . 129 



Figs. 3-5. Staurastrum macrocerum, three views, . . . 134 



6,7. iurastrum cerastes, front and end view, . . 133 



Staurastrum odontodum, front and end view, . . 134 



10,11. Staurastrum Ophiura, front and end view, . 134 



]-, 13, 11. Staurastrum coroxui \ i i m, \';ir. Floridense, , 135 



Fig. 15. Staurastrum pentacladum, front and end view, L36 



Figs. 16, 17. Staurastrum gracile, front and end view, . . 133 



