PLATE IX. 



Figs. 1 5. STACHEIA CONGESTA, nov. (Pages 117, 110.) 



Figs. 1 4. Lateral aspect, showing the general external characters. 

 Fig. 5. Transparent longitudinal section. 



From Carboniferous specimens. All magnified 50 diameters. 



Figs. 6 8. STACHEIA ACERVALIS, Brady. 

 Carboniferous, x 40 diam. 



(Pages 116, 110.) 



Figs. 9 13. STACHEIA POLYTREMATOIDES, nov. (Pages 118, 110.) 



Fig. 9. Specimen growing round a fragment of a Polyzoon. X 30 diam. 

 Figs. 10 12. Specimens growing on the surface of Encrinites. X 20 diam. 

 Fig. 13. Transverse section showing the general structure and the arrange- 

 ment of the chambers, x 70 diam. 



