NIAGARA FALLS AND VICINITY 1 65 



Found rarely in the lower Rochester shale, associated with I c h - 

 thyocrinus and other rare fossils. Niagara sections. Also in 

 the same shale at Lockport (Hall). 



Genus lioclema Ulrich 



[Ety.: AsTo?, smooth; -Arj/ia, twig] 



(1882. Cin. soc. nat. hist. Jour. 5 -.141 , 154) 



Zoarium ramose, lamellar, subglobose or incrusting; surface 

 frequently exhibiting distinct monticules or maculae; zooecia with 

 .subcircular or irregularly petaloid apertures, separated by abundant 

 angular mesopores, which in some species are open at the surface, in 

 others closed; diaphragms few in the zooecia, abundant, sometimes 

 crowded in the mesopores; acanthopores numerous and strong in 

 the typical species, small and inconspicuous in others. 



Lioclema fiorida (Hall) (Fig. «*& 



62). Callopora fiorida JjB , J a m 



Hall (1852. Pal. N. Y. 2:146, " ^ V £'/£? 



•pi. 40, fig. 2a-f) ' r „ ~J- x '-'<-' 



Distinguishing characters. Ex- 

 planate or incrusting habit; tubu- ^^^i^p+x K<: -* v : *' ' Y c - 



lar cells; floriform apertures the 

 margins of which appear as if 

 formed of segments of six or „. „„,.. , 



Fig. 62 Lioclema florida with side and summit 



seven smaller curves; each angle views enlarged ' ancltwo calyxes much enlarged 

 of aperture furnished with spine (acanthopore) ; mesopores angular 

 in perfect specimens. 



Found in the Bryozoa beds of the Rochester shales at Niagara, 



rare. Also at Lockport (Hall). 



$sS « Lioclema aspera (Hall) (Fig. 63). 



Callopora aspera Hall (1852. 



Pal. N. Y. 2:147, pi. 40, fig. 4a-i) 



, ' / ' "".■- f Distinguish-in? characters. Stems 



\ solid or hollow cylinders, often also 



• L incrusting other bodies in broad, 



explanate or foliate expansions; 



Fig. 63 Lioclema aspera with enlargements of , , , . , , . ,. r 



surface clavate or thickened extremities of 



stems; circular or slightly oval apertures; finely reticulated inter- 

 spaces ; margins of apertures surrounded by minute points (acantho- 



