PLATE IX. 
Bugula. 
PAGE 
Figure 1. — Bugula bicornis, . . . . . . .40 
la, magnified; lb, back view; lc, two avicularia and radical 
tube ; Id, smaller avicularium arising close below the aper- 
ture ; le, larger avicularium, showing the digitiform process. 
,, 2 . — Bugula reticulata, var. unicornis, . . . . .40 
2a, magnified ; 2b, back view ; 2c, ooecium ; 2d, avicularium. 
