PLATE II. 



Fig. 



1. Thamnastriea Browni,D\yt\c?a\. (Great Oolite). (Page 16.) 



2. The calices, magnified. 



;3. The costse and epitheca, magnified. 



4. A septum, magnified. 



5. A costa, magnified. 



6. Thamnastrcea Waltoni, Ed. & H. (Inferior Oolite.) 



'•) 



8. > Details, magnified. 



9.) 



' |- Isasfrcea (/ibbosa, Duncan, and magnified view. (Page 15.) 



\-2. Montlivaltia trochoides, Ed. & H. (Inferior Oolite.) 



13. 31onllwalfia Morrisi, Duncan. (Inferior Oolite.) (Page 17.) 



