724 



BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



C *85 



A ,? 



E. Mecynoecia soror 1'ucla. 1892. Longitudinal section through the ovk-ell, X 13. 



A-D. Mecynoecia dclicatula Busk, 1875. A. Fragment of zoarium, X 25, showing the elon- 

 gated ovicell with transverse oeciostome. B. View of the embryo, X 270. C. Section of the ovi- 

 cell containing embryos, X 85. D. Section of the surface pore tubes, X 330. The exterior mem- 

 brane (m) is the ectocyst. (A-D after Waters, 1914.) 



E. Mecynoecia soror Pocta, 3892. Longitudinal section through the ovicelli, X 13. 



FIG. 237. Genus Mecynoecia Canu, 1918. 

 A, B. Two ovicelled specimens of Mecynoecia deiicatula Busk, 1S75. (After Smitt, 1872.) 



