NIAGARA FALLS AND VICINITY 



167 





N 3? 



Found abundantly in the 

 Bryozoa beds of the Rochester 

 shales, at Niagara, also at 

 Lockport (Hall). 



Trematopora ( ?) striata Hall 

 (Fig. 66) (1852. Pal. X. Y. 

 2:153, pl- 4°A, fig. /a-d and 

 8a-b) 



Distinguishing characters. 

 Expanded at the base ; strongly 

 striated; slender, cylindric, 

 scarcely tapering branches ; ob- 

 long oval apertures distant 

 from each other about the 

 width of the aperture; intera- 

 pertural space with continuous groove. 



Found in the Rochester shale at Lockport (Hall), probably also 

 at Xiasrara. 



Fig. 66 Trematopora (?) striata much enlarged 



Genus callopora Hall 



(emend. Ulrich) 



[Ety. : xdAXos, beauty; -6po<z, pore] 



(1852. Pal. N. Y. 2:144) 



Zoarium usually ramose, the branches frequently anastomosing 

 and forming bushy clumps; zooecia at first prismatic, four to eight 

 sided, gradually becoming cylindric in most cases; at first with 

 closely set diaphragms, becoming more distant, finally in the mature 

 region usually closely set; apertures closed at times by perforated, 

 often ornamental covers ; mesopores more or less numerous, angular, 

 crowded with diaphragms. No acanthopores. 



Callopora elegantula Hall (Fig. 67) (1852. Pal. N. Y. 2 :i44, 

 pi. 40, fig. ia-m) 



Distinguishing characters. Cespitose or fruticulose groups of 

 small stems frequently branching; branches bifurcating or variously 

 diverging from the stem; solid; extremities often hollow or cup-like 

 indentations, also blunt; apertures circular, the opercula or covers 



