506 



Report of the State Geologist. 



Figs. 49, 50. Illustrating carinee of group d . 



Fenestbapora, Hall. 

 (Kept. N. Y. State Geologist, p. 36, PI. 2, fig. 17. 1885.) 

 Type, Fenestrapora liperforata, Hall. 



(Plate 3, figs. 6-12.) 

 Brjozoum having the same general aspect as Fenestella. On 

 the noncelluliferous face there are numerous triangular or circular 

 pores or apertures of the larger tubuli. On the celluliferous face 

 the cell apertures are disposed in two ranges, separated by a 

 prominent carina, which has a row of small pores along the 

 middle of its expanded summit. 



PlILOPOBELLA, Hall. 



(Pal. K Y,, Yol. YI, p. lYl. 1887.) 

 Type, Ptiioporella laticrescens^ Hall. 



(Plate4, figs. 1-6.) 

 Bryozoum ramose, forming infundibuliform expansions ; 

 branches of two sizes, the smaller or secondary branches pro- 

 ceeding laterally from the larger or primary ones, either from 

 one or both sides. As the frond expands other large branches 

 proceed laterally from the primary ones, this process continuing 

 during the growth of the frond ; cell apertures arranged in two 



