PLATE VII. 



Fig. 1. ALVEOLITES BILLINGSI, Nich. Nat, size. (p. 55.) 

 Fig. 2. FAVOSITES RETICULATA, De Blain. Nat. size. (p. 51.) 

 Fig. 3. ALVEOLITES RAMULOSA, Nich. Nat size. (p. 55.) 



Fig. 4. ALVEOLITES SELWYNII, Nich. Nat size. (p. 56.) 

 Fig. 5. FAVOSITES DUBIA, De Blain. Nat. size. (p. 51.) 



Fig. 6. FAVOSITES CHAPMANI, Nich. Nat. size. (p. 52.) This figure does not satis- 

 factorily exhibit the extreme obliquity of the corallites, and the resulting 

 obliquity of the calices. 



Fig. 7. FAVOSITES POLYMORPHA, Gold. A small fragment. Nat. size. (p. 50.) 

 Fig. 8. FAVOSITES FORBESI, Edw. & H. Nat. size. (p. 48.) 



