804 



BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



Fx12 



H x12 



x12 



FIG. 261. Family Frondiporidae Busk, 1875. 



A-H. Frondipora verrucosa Lamouroux, 1821. A, B. Two longitudinal thin sections of a 

 branch, X 12. C. Transverse section, X 12, through an ovicelled branch showing the position of 

 the ovicell between the fascicles. D. Transverse section through a branch, X 25, and cutting a 

 fascicle longitudinally. E. Larva of Frondipora showing internal sac (s). (After Barrois, 1882.) 

 F, G. Ovicelled branches. X 12. H. Transversal section though an ovicell, X 12, showing that 

 the isolated tubes form the pillars supporting the upper w;ills. 



