PLATE XI. 



Figures magnified 500 diameters. 



PAGE. 

 Fig. 1. DOCIDIUM CRENULATUM (C. nodtilosum) , . . 51 



Figs. 2, 3, 4. DOCIDIUM TRABECULA. Compare Plate XV, figs. 1-7, . 51 



Fig. 5.. DOCIDIUM FLOTOWII, Variety, . . . . . ")2 



Figs. 6, 7. DOCIDIUM TRUNCATUM, ..... 52 



Fig. 8. DOCIDIUM CLAVATUM, .... .51 



