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SYNOPSIS OF GENERA. xxiii 



Unitrypa, s. g., Hall (Report of State Geologist for 1884, p. 36. 1885). 

 [Type, Fenestella (Hemitrypa) lata. Hall.] 



Bryozoum infundibuliform, branches connected by dissepiments. Cell ap- 

 ertures in two ranges, separated by carinae, which are elevated, widened at the 

 summit and connected by thin lateral processes or scalae which are sometimes 

 very closely arranged, at other times distant. 



Examples: Fenestella {Unitrypa) lata, pi. Hi, figs. 1-10. 



Fenestella (Unitrypa) pernodosa, pi. liii, figs. 1-11. 



Isotrypa, s. g.. Hall (Report of State Geologist for 1884, p. 37. 1885). 

 [Type, Fenestella (Hemitrypa) conjunctiva. Hall. J 



Bryozoum infundibuliform ; branches connected by dissepiments. Cell aper- 

 tures in two ranges, separated by carinae which are elevated and much thickened 

 above, and connected by distant lateral processes or pseudo-dissepiments, 

 giving to this face of the frond the appearance of the non-celluliferous face. 

 The reverse face of the frond or non-celluliferous face has conspicuous pores, 

 situated on or near the dissepiments. 



Exnmple : Fenestella {Isotrypa) conjunctiva, pi. liv, figs. 10-21. 



Loculipora, s. g., Rominger (ms.). 



[Type, Fenestella (Loculipora) perforata. Hall.] 



Bryozoum infundibuliform ; branches connected by dissepiments. Cell aper- 

 tures in two ranges, surrounding the fenestrules. Branches, and dissepiments 

 carinated ; carinae elevated and much thickened above, having the appearance 

 of the branches and dissepiments of the non-celluliferous face of the frond. 



Example : Fenestella {Loculipora) circumstata, pi. liv, figs. 22-25. 



Hemitrypa, s. o., Phillips (Pal. Foss. of Cornwall, Devon and West Somerset, 

 p. 27. 1841). [Type, Hemitrypa oculata, Phillips.] 



Bryozoum infundibuliform ; branches connected by dissepiments. Cell aper- 

 tures in two ranges, .separated by carinas which are elevated, widened at the 

 summit and connected by scalae which meet midway and coalesce forming 

 pseudo-carinae. 



Example : Fenestella {Hemitrypa) biseriatis, pi. xxii, figs. 13, 16-18. 



