0 . an t i 1 larum - 2- 
Original description: 
**A speoiaen in the form of a rolled flint, found with 
silieif led Wood, has the corallum large, tall, probably resembling 
in shape that of the San- Domingan A, exothecata * Corallites 
close, unequal in size, hut quite distinct; the transverse 
section shows them to he circular in outline. Septa in six 
systems of three cycles* The primary and secondary septa are 
nearly equal, and reach th the columella; the tertiary are small 
and straight; all are slender, wide apart, and very distinct. 
Costae tolerably developed, suhequal. Walls moderately developed, 
by no means strong. Columella small, and occupying a small 
space. Indotheca greatly developed, vesicular, and forming 
cells between the septa* 'Exotheca well developed; large cells 
broad, others squarer, with shelving dissepiments. Diameter of 
the corallites 3/l0 inch* ~ - 
The interspaces are filled with opalescent or porcellanous 
silica; sclerenchyma often destroyed* 
Coll, Gaol* Soc* ” 
Locality : Montserrat. 
