Plate XX. 



Fig. 71. Halecium flexile. 



A. Natural size. 



B. Fascicled stem. 



C. Portion of branch showing arrangement of hydrothecse. 



D. Gonophores. 



E. Hydranth. 



Fig. 72. Halecium halecinum. 



A. Natural size. 



B. Portion of branch showing female gonophores with small terminal 



hydranths. . 



C. Portion of branch with malegonophores. 



Fig. 73. Halecium kofoidi. 



A. Portion of stem showing mode of branching, nodes and hydrothecse 



(After Torrey). 

 B Gonophore (After Torrey). 



Fig. 74. Halecium labrosum. 



A. Natural size. 



B. Portion of stem showing mode o 1 ra hing. 



C. Gonophore. 



