1G8 



A single fragment of a free frond was found in the Deniissa 

 bed of Section 5, at Eighteen Mile Creek. 



Gems FISTULIPORINA. Simpson. 



[ Ety. : Fistula, pipe ; poros, pore.] 

 (1894: 14th Rep't X. Y. State Geol., p. 5o5, PI. XXI.) 



BryozoLini consisting of free or incrnsting flat and spreading 

 fronds, or of masses made np of successive layers. The cells 

 are tubular and open by circular or oval apertures, which 

 are furnished with granular or spinulose rims or peristomes, 

 and are irregulai-ly disposed. The space between the cells is 

 occupied below by irregular vesicles and near the top by 

 irregularly superimposed vesicles, or by meso})ores with 

 tabultP. Space between apertures occupied by angular pits, 

 and often, also, by nodes or' spines. Base covered by strong 

 epitheca. The genus differs from Fistulipora in its circular 

 cell apertures, "and in the absence of pseudosepta and 

 lunaria." 



Ulrich's genus Cyclotrypa, [uiblislied in Zittel's Paheon- 

 tology (Eastman's translation), p. 2()9, is a synonym, 

 Simpson's name having priority according to the date on 

 the title page. 



FiSTULIPORINA SCROBICILATA. (Hall.) (Fig. Gl.) (Pal. 

 N. Y., Vol. YL. p. 212, PI. LYIll.) 



Distinguishing Ch;irncters. — Cell apertures 

 distant from each other something more than 

 their diameter ; strong granulose peristomes ; 

 large mesospores, frequently equal to cell- 

 apertures, with slightly elevated margins; 

 large sterile ( poreless ) blotches or macuke, 

 1 to 2 mm. in diameter, occur at intervals; 



Fig. 61. FistuUpo- 



rina scrobicuiata. adiaceut aperturcs not larger than others. 



A portion of the sur- .! i c^ 



fXi^HauSufsimp^ Fouiid iu tlic "Hamilton group. Eighteen 

 '^"'^)- Mile Creek, Erie County, X. Y."' ( Hall.) 



FiSTULIPORINA SEGREGATA. (Hall.) (Fig. G2.) (Pal. 

 N. Y., Yol. YH., p. 219, PI. LIX. ) 



