PLATE II. 



Fig. T. A young and nearly globular specimen of Favosites Forbesi, E. and H., 



from the Wenlock Limestone of Dudley, of the natural size. 

 Fig. I a. Upper portion of the vertical section of a similar specimen of the 



same species, from the Wenlock Limestone of Benthall Edge, enlarged 



five times. 

 Fig. I b. Transverse section of another young example of the same species, 



from the Wenlock Limestone of Dudley, enlarged five times. 

 Fig. 2. A young specimen of Favosites Forbesi, E. and H., var. Waldronensis, 



Nich., from the Niagara Group of Waldron, Indiana, of the natural size. 

 Fig. 2 a. Part of a tangential section of another young example of the same, 



from the same locality, enlarged five times. 

 Fig. 2 b. Vertical section of the same species, enlarged five times. 

 Fig. 3. Transverse section of Favosites Fo?-besi, E. and H., var. Ei/cle/isis, 



Nich., enlarged five times, showing the well-developed septa. 



