76 
PALAEONTOLOGY OF NEW YORK. 
CCELOC AULIS, Hall. 
Callopora (Ccelocaulis) aculeolata. 
PLATE XXVI, FIGS. 16, 17. 
Callopora aculeolata, Hall. Trans. Albany Institute, vol. x, abstract, p. 7. 1881. 
“ “ “ Report of State Geologist for 1882. Expl. pi. 24, figs. 16, 17. 1883. 
Zoarium ramose, hollow; branches from 2.50 to 3 mm. in diameter. Cell aper¬ 
tures oval, length 50 mm., width from one-half to three-fourths the length; 
irregularly disposed, frequently in contact: peristomes moderately strong, 
equally elevated, with from one to three conical nodes. Mesopores minute, 
indistinct; margins thin, slightly elevated. 
Formation and locality. Upper Helderberg group, N. Y. 
Callopora (Ccelocaulis) irregularis. 
PLATE XXVI, FIGS. 11-15. 
Callopora irregularis, Hall. Trans. Albany Institute, vol. x, abstract, p. 7. 18S1. 
In part Trematopora (Callopora) irregularis , Hall. Report of State Geologist for 1882. Expl. pi. 24, figs. 
11-15. 1883. 
Zoarium ramose, hollow; branches from 2 to 3 mm. in diameter. Cell apertures 
circular, irregularly disposed, diameter .33 mm.: peristomes strong, distinctly 
and equally elevated. Mesopores large, indistinct, frequently obsolete. 
Peristomes and surface finely granulose. 
Formation and locality. Upper Helderberg group, Central New York. 
Callopora (Ccelocaulis) Hyale. 
PLATE XII, FIGS. IS, 19. 
Callopora Hyale, Hall. Twenty-sixte Rept. N. Y. State Mus. Nat. Hist., p. 100. 1874. 
“ ‘‘ “ Thirty-second Rept. N. Y. State Mus. Nat. Hist., p. 155. 1870. 
“ “ “ Report of State Geologist for 1882. Expl. pi. 12, figs. 18, 19. 1883. 
Zoarium ramose, hollow, thickness .60 mm.; branches 5 mm. in diameter. Cell 
apertures obscurely trilobote, diameter .33 mm., irregularly disposed ; distant 
less than the diameter of an apertures. Peristomes strong, equally elevated. 
Mesopores minute, two or three series between adjacent apertures. Surface 
marked by frequent maculae destitute of cell apertures. 
