0« eras bo lame Hat a -27- 
Orbicella eras so lame llat a var. pulchella. 
•’Corallum large, convex, irregular in superficial outline, 
Corallites tall, varying in diameter on account of the mode of 
growth, rather crowded at the surface, circular in transverse 
section, with abundant coenenchyma. Costae wide apart, Calices 
rather crowded, and the intercalicular furrow not so distinct as 
in the typical form of the species. Diameter from l/3 to l/Z 
inch. Septa large at the margin, more or less thin elsewhere; in 
six systems with a very irregular septal distribution. In young 
s 
corallites there are two cycles, and a third in two systems (eight 
large septa) • In larger corallites there are three cycles in four 
systems, and two in the rest (ten large septa). In the largest 
there are three cycles in all systems but one (eleven large 
septa). In some large corallites a fourth cycle evidently existed 
near the calicular margin. 
In some specimens the marginal enlargement of the septa is 
rendered less distinct by rather thick and not very linear septal 
development internally. The corallum is too large to admit of 
