0. insignia -12- 
often 'bent, almost equal, and of about the same thickness as the 
septa; occasionally a rudimentary cost a is seen, and is net 
represented by a septum* The exotheca is inclined and abundant * 
The endotheea is very abundant and inclined. 
Diameter of corallites (costae not included) 4/l0 inch. 4-t 
hoc . Antiguan Tertiary deposits* 
The large size of the corallites, the low septal number, 
the long septa and costae, with the small columella and highly 
developed endotheea, distinguish this species *” 
It has already been stated in discussing the synonymy and va- 
riations of _0. cave rn o sa , that Ch insignia should probably be placed 
in its synonymy. 
