std.c 



mtft 



t.c 



inf 



FIG. 100. Hormiphcra plumcsa, diagrammatic longitudinal (A) and transverse (B 

 sections. The ectoderm is dotted, the endoderm striated, the mesogloea black, and th 

 muscular axis of the tentacles gray. Lettering as in Fig. 159, except ex. p. excretory pore. 



B) 



