CORALS AND BRYOZOA. 
75 
CALLOPORA, Hall. 1852. 
Callopora multiseriata. 
PLATE XXV, FIGS. 6, 7 ; and PLATE XXVI, FIGS. 18, 19. 
Callopora multiseriata, Hall. Trans. Albany Institute, vol. x, abstract, p. 7. 18S1. 
“ “ “ Report of State Geologist for 1882. Expl. pi. 24, figs. 18, 19. 1883. 
“ “ “ Report of State Geologist for 1885, advance sheets. Expl. pi. 25, figs. 6, 7. 
1886. 
Zoarium 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 surface of the branches a striated appearance. 
This species may be distinguished from C. geniculata 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. 
PLATE?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. 
