162 



Umtkypa scalaris. Hall. (Fig. 51.) (Gtli Ann. Rep't 

 N. Y. State Geol.. p. 60, 1886: Report of 1897. PI. XL) 



Disting-uisliing Chanu-ters. — Straight ])arallel and rigid 

 branches; lachler-like a})]iearance of carinte and seala-, the 

 former projecting above the latter; very obliqne scalar, with 

 their snnimits nearest the base of the frond. 



Found in the Demissa bed, at Section 5 (rare). 



Fig. 51. Unitrypri scalaris. (a) A fragment of the 

 carina? and scala? ; (6> an enlargement of the summits of 

 the carina? and sealfe. showing nodes on the oarinse. x 4 : 

 (c) an enlargement showing very thin carinte and soalpp, 

 X 4 : id) an enlargement, showing the under side of the carina^ and seala?. x 4 : le.f) trans- 

 verse sections of different fronds, x 4 : (j/i a transverse section further enlarged, showing 

 the rhomboidal form of the branches, in section at the base, where they are connected by 

 the tranverse dissepiment ; the branches are continued upward into the carina?, which 

 are expanded at the simimit, and connected by the transverse " scalae"" ifrom Hall.) 



Gexus poly for a. ^h Coy. 



[Ety. : Poli/s, many; poros. pore.] 

 (1845: Carb. Foss. Ireland, p. 206.) 



"Bryozonm having the same manner of growth and 

 gtnei'al aspect as Fenestella, bnt having the cell apertnres 

 disposed in three or more ranges, entirely covering the cel- 

 luliferous face of the branches, which are without a median 

 keel or carina." (Simpson, Pal. Bryoz., p. 502.) 



PoLYPORA MULTIPLEX. Hall. (Fig. 51 A.) (Rep"t State 

 Geol. for 1886, p. 66. ibid. 1887. PI. XL) 



Distill o iiishiim Cha meters. — Large infnndibnliform fronds, 

 with fi-eqnent longitudinal folds or undnlations. Non-celln- 

 hferons face; moderately slender, sharply angnlar, straight 

 and rigid, or more or less zig-zag branches, with a slight 

 carina ; comparatively strong, sharply angnlar dissepiments. 



