EXPLANATIONS AND REFERENCES, 

 PLATE CXI. 



Figures magnified 125 diameters. 



PAGE. 

 Figs. 1, 2. CLADOPHORA CANALICULARIS, . . 126 



" 3, 4. CLADOPHORA GLOMERATA, forma clavata, . .128 



Fig. 5. " " rivularis, . . .127 



