Fig. <8.— Sertularia argentea. Gonotheea with acroeyst, showing horns, and 

 maximum breadth, s 30. 



Fig. 79. — Gonotheea with acroeyst, from the side. Horns not shown, x 30. 



Fig. 80.— Sertularia filicula. Gonotheeae. 



Fig. 81. — Sertularia incongrua. Near distal end of branch; three rows of 

 hydrotheeae. x 30. 



Fig. S2. — Same species. Proximal portion of branch; two rows of hydro- 

 theca. x 30. 



Fig. 83. — Sertularia traski. Stem with proximal portion of one branch and 

 origin of another, x 30. 



Fig. 84. — Aglaophenia diegensis. Hydrotheeae, lateral view, x 52. 



Fig. 85. — Same species. Hydrotheea, front view, x 52. 



Fig. 86. — Same species 

 Fig. 87.— Aglaophenia 

 Fig. 88. — Same species 

 Fig. 89. — Same species 



Corbula. x 18. 

 nconspicua. Hydrotheeae, lateral view, x 45. 

 Hydrotheeae, front view, x 45. 

 Corbula. x 18. 



