CORALS AND BRYOZOA. 
189 
sition, the peristomes and the absence of strong septa; from T. (0.) elongata it 
is distinguished by the size of the branches, the larger and much more broadly 
oval cell apertures, their more irregular and much closer disposition. 
Formation and locality. Hamilton group, Fallbrook, four miles east of Canan¬ 
daigua lake, N. Y. 
CALLOPORA, Hall. 
(See pages 21 and 75.) 
Callotrypa, s. g., Hall. 
(See page 24.) 
Callopora (Callotrypa) internodata. 
NOT FIGURED. 
Callopora Internodata, Hall. Trans. Albany Institute, vol. x, p. 182. 1SS1. 
“ “ “ Report of State Geologist for 1888, p. 16. 1S84. 
Zoarium ramose ; bifurcations frequent; branches diverging at an angle of forty- 
five degrees, diameter from 1 to 2 mm. Cells tubular, arising from the 
center of the branch. Cell apertures oval, length about .28 mm., width from 
one-half to two-thirds the length, closely disposed, frequently nearly or quite 
in contact, sometimes irregularly, and at other times regularly arranged in 
longitudinal and oblique transverse, parallel rows, the transverse rows 
being at an angle of forty degrees to the axis of the branch. Peristomes 
moderately strong. Inter-apertural space occupied by minute angular pits, 
the margins of which are elevated equally with the peristomes; there are 
also one or two conical nodes at each aperture, which form the most promi¬ 
nent feature of the surface : sometimes when the cell apertures are very 
closely arranged these nodes are apparently situated on the peristomes. 
This species resembles T. (0.) transvcrsa. in having oval cell apertures, dis¬ 
posed in oblique transverse rows, but differs in having intermediate pits and 
strong, conical nodes, and by the absence of granules. 
Formation and locality. Hamilton group, Darien Centre, Erie county, N. Y. 
