PLATE 34 A (bis). 



Fig- 4. 515. 1. Fatosites nugakensis. (Pag- 125.) 



i a. A fragment from the limestone at Goat island, sliowing the ends of the cells whkh are open. 



4 b. A portion enlarged, sho^rinp the transverse septa and pores in the walls, of the cells. 



4 c. A small spherical form, having the o«lls open, and the walls replaced hy siliceons matter. 



4 d. A small portion enlarged, looking into the cells and sliowing the fierforated walls. 



4 e. A worn specimen from the lower part of the limestone at Lockport. The cells are open, but there are 



no pores visible. 

 4 /. \ section of a small mass of apparently the same species, showing the septa bent downw:ards. 

 4 J. A longitudinal section of another specimen, in which the septa appear al irregular intervals, some of 



them at gre.it distances, probably from a jiart of the original numln-r having been obliterated ; and 



others in close proximity, showing that this feature can iK>t be relied upon to characteriie spf c;6c 



distinctions. 

 4 h. Transverse section, showing the ends of the cells and the separation of the walls, forming distinct and 



sepaiatc tubes. 



4 i. A larger and better preserved specimen of this spedes. 



Fig. 5. 516. 2. Favosites FAVOSA? (Pag. 126.) 



o «. A longitudinal section of a small hemispherical mass. 



5 b. Sc-ction of another specimen, where the septa are more distant and irregular, 

 4> f . The solid columns of the same species. 



5 d. Transverse section of the cells. 



5 c. An impression left by the exterior surface of one of these masses. 



5 /. A Lirger individual of the same ^>ecies, having the septa more uniformly disposed. 



5 g. A portion of the last enlarged. 



