Geis'eea of the E"orth American Palaeozoic Bryozoa. 613 



Original diagnosis. "A Fenestellidia consisting of infundibuli- 

 form, folded, perforated fronds or foliaceous expansions; cell- 

 ules on the whole of the outer or under surface of the fronds, 

 and planted more or less approximately to a position at right 

 angles to the plane of the capillary tubular basal plate; cellule 

 apertures with plain margins and parallel to the surface of the 

 fronds." 



The original illustrations, a photo-engraving of which is given 

 below, show this genus to be a Fenestelloid form, the branches 

 of which are connected by celluliferous dissepiments, in this re- 

 spect differing from the genera hitherto described. 



A discussion of this genus will be found in the Annual Report 

 of the :Nr. Y. State Geologist for 18^3. 



Svnocladia, King. 

 (Ann. and Mag. Nat. Hist., 2d Series, Yol. Ill, p. 389. 1849.) 



Type, Syiiocladia virgulacea, Phillips (sp.). 



Bryozoum infundibuliform, branches bifurcating, having at 

 regular intervals lateral projections, obliquely ascending, coalesc- 

 ing with an opposite series from adjacent branches, and forming 



Synocladia virgulacea. Frond, natural size. 



arcuate or angular dissepiments. In some specimens many of the 

 lateral projections are not oblique, in which case they have the 

 66 



