t'LATE XII. 



Figures magnified 500 diameters. 



Page. 

 Pig. 1. Tetmemobcs GIGAJJTEtrS, . 99 



" 2. DocroiuM Aecheeii, ... 51 



" 3. DOCIDITTM NODULOSTJM, . . 51 



'•' 4. DociDroM WooDn, . . .55 



" 5. DociDiUM Baculum, Var. Floridense, . . . .53 



Figs. 6, 7. STAtTKASTEUM VBSICTJLATDM, . . . 132 



" 8, 9. Sphaebozosma PtrLCHELLtrar, Var. bambusioides, . . 29 



" 10-13. EuASTRUM PECTiNATUM, front, lateral and transverse views, 109 

 " 14-16. Htalotheca dissiliens, Var. hians, . . . 22 



