CORALS AND BRYOZOA. 75 



CALLOPORA, Hall. 1852. 

 Callopora multiseriata. 



PLATE XXV, FIGS. 6, 7 ; AND PLATE XXVI, FIGS. 18, 19. 



Callopora mtMisenala, Hall. Trans. Albany Institute, vol. x, abstract, p. 7. 1881. 



" " " Report of SUte Geologist for 1882. Expl. pi. 24, figs. 18, 19. 18SJ. 



" " " Report of State Geologist for 1885, advance sheets. Expl. pi. 25, figs. 6, 7. 



1886. 



ZoABiUM ramose, solid ; branches 2 mm. in diameter. Cell apertures oval, length 

 .33 mm., width two-thirds the length ; irregularly disposed, distance from 

 each other varying from contact to a little more than the width of an aper- 

 ture: margins very thin, not elevated. Mesopores elongate, arranged in 

 longitudinal rows, giving to the surftice of the branches a striated appearance. 



This species may be distinguished from C. gmiculata by the elongate meso- 

 pores and striated appearance of the surface. 



Formation and locality. Upper Helderberg group, Warner's Quarry, south of 

 Le Roy, N. Y. 



Callopora geniculata. 



PLATB»XXV, FIGS. 1-3. 

 Callopora geniculata. Hall. Report of State Geologist for 1885, advance sheets. Expl. pi. 25, figs. 1-3. 1886. 



Zoarium ramose, solid; branches 1.50 mm. in diameter; bifurcations frequent. 

 Cells tubular, gradually enlarging. Cell apertures oval, length .33 mm., 

 width two-thirds the length ; usually irregularly disposed, and sometimes 

 having an indistinct longitudinal arrangement: margins moderately strong, 

 not elevated. Mesopores minute, from one to three series between adjacent 

 cell apertures. Surface without maculae. 



Formation and locality. Upper Helderberg group, Ontario, Canada. 



