Plate IV. 



Fig. 7. Bimeria gracilis. 



A. Natural size. 



B. Portion of fascicled stem. 



C. Portion of branch. 



I). Portion of branch showing gonophore. 



Fig. S.Garveia grœnlandica. 



A. Natural size. 



B. Hydranth and pedicel. 



C. Gonophores. 



Fig. 9. BougainvUlia glorietta. 



A. Natural size. 



B. Portion of stem showing mode ol branching, hj dr. mi lis and gonophores. 



Fig. 10. Bougainvillia mertensi. 



A. Natural size. 



B. Portion of fascicled stem. 



C. Terminal portion of branch. 



D. Gonophore. 



