Ast rocoenxa b^&&4ena-i 3 sp. ncv* 
PI. fig. 
1902* Astrocoenia sp. Vaughan, Quart. Jour. Geol. Soc. London, 
Vol. LVIII, p. 358. 
Corallum forming thick branches which are elliptical in 
cross-section. The type specimen possesses the following dimen- 
sions! length, 77 mm. ; greater diameter of larger end, 29 mm., 
lesser, 19 mm. ; greater diameter of smaller end, 22.5 mm., lesser, 
16 mm* 
Corallites polygonal, separated by walls which usually are 
acute along the upper edge and are thicker below. In rare cases 
apparently the wall may be 1 mm. in thickness. When the wall is 
not merely an acute ridge, short costae and a few granulations 
are present. The diameter of the corallites is from 1.5 to 2 mm. 
Calices excavated but not very deep. 
Septa, moderately thick, sixteen in number, of which eight 
extend to the columella and eight are short. The outer ends are 
