PLATE X. 
Bugula. — Onchopora. 
PAGE 
Figure 1. — Bugula mirabilis, . . . . . . .39 
la, upper or triserial portion ; 1 b, lower or biserial portion. 
,, 2. — Bugula sinuosa, ....... 39 
2 a, magnified ; 2 b, avicularium. 
,, 3. — Bugula leontodon, ....... 39 
3a, triserial portion ; 3b, biserial portion. 
,, 4. — Onchopora sinclairii, ...... 103 
4a, magnified. 
