(Mcgiral Jtobeg uf % State of geto fork. 
(pH 
\o$ 
if/Niy- 
PALEONTOLOGY: 
Yol. vi. 
CORALS AND BRYOZOA: 
TEXT ^3STE ELITES. 
CONTAINING 
DESCRIPTIONS AND FIGURES OF SPECIES 
FROM THE 
LOWER HELDERBERG, UPPER HELDERBERG AND HAMILTON GROUPS. 
JAMES HALL, 
STATE GEOLOGIST, AND PALAEONTOLOGIST. 
ASSISTED BY 
GEORGE B. SIMPSON. 
Air 
X ' />„ 
■ . _ c 
m/r 
ALBANY, N. Y.: 
CHARLES VAN BENTHUYSEN & SONS. 
1887. 
S', D, ^ 
SS3Y; 
