EXPLANATION OF PLATE XXXIV. 



* Page. 



FIG. 1. Sefopora biserialis 32 



la. Non-poriferous side . (Hare collection.) 

 Ib . A part of same (enlarged) . 

 Ic. Poriferous side (enlarged). 

 Id. Another specimen. (Hare collection.) 

 Carboniferous, Upper Coal Measures. 



FIG. 2. Fenestella shumardi 24 



2a. Specimen well preserved. (Hare collection.) 

 2b. Surface (enlarged) . 



Carboniferous, Upper Coal Measures. 



FIG. 3. Fistulipora nodulifera . 



Part of a branch. (Hare collection.) 

 Carboniferous, Upper Coal Measures. 



FIG . 4 . Lyropora retrorsa 27 



Marginal support. (Mus. Mo. Geol. Sar.) 

 Carboniferous, Burlington limestone. 



FIG 5. Fenestella rudis 23 



Fragment . (After Ulrich . ) 

 Carboniferous, Keokuk limestone. 



FIG . 6. Actinotrypa peculiaris 18 



Surface (enlarged). 

 Carboniferous, Keokuk limestone. 



