PLATE YIII. 



FaVOSITES TrHEllOSA. 



Favosiles tubrrosa Roiiiiiiger. Gpolo<;ic:il Survey of Micliif^aii : I'aljEcintoldgy ; iiied.* 

 hdsaltica (Goldfuss) Billiiijis. Canadian Jdufiial. Vol. IV. p 108, li'g. 8. 1859. 

 Forhesi Nicholson. Palseontology ot Ontai-io. Vol. I, p. 48, pi. v, fig. 8. 1874. 

 Not " " Edwards -Haimf:. Monograph des Polyp. Foss. des Teri-aiiis Palaeozoiques. 



Fig'. 1. View of a much weathered flagmen r, slio wing the projecting spine-hke proces.ses which 



repre.S'Ht tlie transver.-ie plites, and also the nuiral pores. 

 Fig. 2. View of a small chuate specimen, having unusually small cells (perhaps a distinct form). 

 Fig. 3. A^iew of a larger clavate specimen with large cell.*, and showing very distinctly the two 



kinds. 

 Fig. 4. Longitudinal section of a specimen similar to the last, showing the curving of the cells from 



their origin tovvai-ds the outer surface, and also the mural pores and partial transverse 



diapln-agms. 

 Fig. 5. View of a large solid specimen, showing the different sized cells, and also the imperfect 



transverse septa, presenting the aspect of rays of the cells. 

 Fig. G. View of a large ramose specimen, showing the diflerent sized cells covered by the imper- 

 fect epitheca over a great part of the surface. 

 Fig. 7. Enlargement from Fig. 1, showing tlie impeifect and irregular spine-like processes of the 



diapliragm.s. Fiom the Upper Helderberg group. The specimen fig. 2 is from 



Cayuga, Ontario, the otliers from near Akron, N. Y. 



* This species was sent lo the printer under the name of Fnmsites Nichalsoni Hall, but Dr. Rominger having 



stated to the author tliat he had already useti tlie name F. tuhcrof^a, the latter is liere adopted. 



