120 A. E. Verrill — Bermudian and West Indian Reef Corals. 



closer, and strongly spinulose, with small, but strong, acute, rough 

 spines. The collines are radial at first, but may soon become 

 sinuous. They may be solid, or they may be double with a groove 

 on top, more or less wdde and deep. In many large specimens a con- 

 siderable proportion of the calicles are simple. 



A medium specimen, 80"™ across, has usually 10 to 12 septa to the 

 centimeter, of which 7 or 8 are larger ones, the others being much 

 smaller. The larger calicles are 20 to 25™"" wide, but others on the 

 same coral are not over IS"""" ; they are 8 to 10™'" deep. This 

 example has double walls. The columella in this is made up of few 

 strong trabeculfe and angular spines. In this specimen the larger 

 septa are thickened toward the columella and bear on that part 

 large, thick, spiniform teeth ; more distally the teeth are smaller, 

 decreasing to the margin. PI. xviii, fig. 2. 



A very well grown Bermudian specimen, 100™™ in diameter, has 

 five pretty nearly circumscribed large marginal calicles ; four of 

 them are just beginning to have marginal infoldings, for new 

 collines. In this the diameter of the undivided calicles is 28™'", but 

 some that are beginning to divide are 30 to 33™™ across, transversely, 

 but 40 to 45™™ across the broadest parts; depth 10 to 13™™. The 

 collines are double-walled in most places, with a wide, deep, inter- 

 mural groove. 



The septa are numerous, close, rather thick, especially toward the 

 columella ; the edges are strongly and rather regularly toothed, the 

 teeth being mostly acute and thickened, generally decreasing in 

 length toward the margin of the calicles. The costae are thickened, 

 little elevated, roughly spinose, with small acute spines. 



This coral was attached by a small central pedicel and the under 

 side is six-lobed and imperfectly covered with epitheca to within 

 4 to 8™™ of the margin. The columella is formed of rather slender, 

 loose trabecular and spinous processes. PI. xix, fig. 2. 



A Bermudian specimen with six unusually large and open, nearly 

 simple, marginal calicles has six large, regular marginal lobes, con- 

 spicuous on the under side ; only one of these has begun to infold 

 the margin, for secondary divisions. The collines are thick and 

 nearly solid. The five undivided marginal calicles are 22, 23, 28, 32, 

 and 35™™, in transverse internal diameter, from wall to wall ; the 

 one that has just begun to divide is 40™™ across and 52™™ long ; the 

 most regular one is 32™™ wide and 40™™ long ; the central calicle is 

 about 20 by 25™™ across, and 15™™ deep ; the marginal calicles are 

 about 8 to 10™™ deep. (PI. xx, fig. 2.) 



