1 66 NEW YORK STATE MUSEUM 



pores) which give the entire surface ah asperato-granular 

 appearance. 



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

 also at Niagara. 



Genus bythopora Miller & Dyer 



[Ety. : ftudos, depth; n6po<s, pore] 

 (1878. Contrib. to paleontology no. 2, p. 6) 



Zoarium usually with slender branches, sometimes 

 of considerable size; diaphragms obsolete; apertures 

 oblique, narrowing above; interspaces canaliculate; 

 mesopores few; acanthopores strong, rarely more than 

 one to each zoarium, sometimes wanting. 



* #' Bythopora spinulosa (Hall) (Fig. 64). Trematopora 

 N M spinulosa Hall (Pal. N. Y. 2:155, P 1 - 4 oA ) 



\ J* Distinguishing characters. Oval apertures; cylindri- 

 }% cal branches; strong spines (acanthopores) arranged at 

 r. »i nearlv regular intervals. 



Found in the Rochester shale at Lockport. (Hall) 



Fig. 64. Bytho- 



eniarged pinulosa Probably occurs also at Niagara. 

 Genus trematopora Hall 

 [Ety.: rpfifxa, foramen; -opo^, pore] 

 (1852. Pal. N. Y. 2:149) 



Zoarium ramose ; surface smooth or with monticules ; zooecia thin- 

 walled, the contact lines of walls of adjoining zooecia distinct; dia- 

 phragms few, in the proximal ends of the zooecia; apertures circular 

 or oval, with a more or less well marked peristome; interspaces solid; 

 mesopores irregularly angular, often 

 obscurely moniliform, with diaphragms -J | 



at the constricted parts; acanthopores \-< -• 

 of medium or small size usually present. 



Trematopora tuberculosa Hall (Fig. , ;^ 



65) (1852. Pal. N. Y. 2:149, pl- 4 oA > 

 fi g- ia-g) 



Distinguishing. characters. Irregularly 



Fig. 65 Trematopora tuberculosa with 



ramose and stout branches; tuberculous enlargement of surface 

 monticules; tubular cells with oval apertures and thin elevated cali- 

 cle or margin which is spinulose (bearing acanthopores); inter- 

 apertural spaces solid, but septate below. 



