EXPLANATION OF PLATES 



(All figures magnified approximately 20 diameters) 



Plate 32 



1. Eudendrium rugosum: Portion of colony showing the wrinkled perisarc and 



the male gonophores. 



2. Campaniilaria ahyssa: a, Portion of colony showing nature and arrange- 



ment of the hydrothecae; 6, portion of colony showing branching. 



3. Oonothyraea integra: Portion of colony showing hydrothecae and gono- 



phores. 



4. Egmundella fasciculata: a, Portion of fascicled stem showing position of the 



nematophores ; h, portion of simple stem without nematophores. 



Plate 33 



5. Stegopoma fastigiata: a, Portion of colony showing hydrotheca and gono- 



phore ; ft, another view of the hydrotheca. 



6. Haleckim diminutivum : a, Portion of stolon with single hydrophores and one 



colony with two hydrophores; &, a colony with three hydrophores. 



7. Euperisiphonia rigida: a, Portion of colony showing fascicled stem and 



branches ; 6, portion of the axial tube bearing hydrothecae ; c, portion of 

 the axial tube with the hydrothecae separated from the wall of the tube. 



8. Diphasia crassa: a, Portion of main stem showing the proximal part of 



the opposite branches; &, portion of branch showing arrangement of the 

 hydrothecae. 



580 



II. S. GOVERNMENT PRINTING OFFICE: 1940 



