0. eras so lame 1 lata -30- 
Orkicella crassol&mellata Tar* minor. 
PI. XIII, fig, 6. 
"Corallites tall, slender, crowded, distinct*, walls circular 
not thick, Calices circular, somewhat variable in size; the 
largest is 3/l0 inch in diameter. The larger septa are spear- 
shaped, the smaller linear; they are in six systems of two cycles 
rarely three cycles in two systems in some corallites. Primary 
septa much larger than the secondary, hut nearly equalling them 
when there is a third cycle. Columella large. 
The alternate large and small, spear-shaped and linear 
septa are very well seen in this form. The same details as in 
this form are found in several specimens with larger corallites. 
Marl-formation of Antigua. Coll. Geol. Soc,, and Mr, W. W, 
Jones* s Coll." 
