FORSTER COOPER.—ANTIPATHARIA. 319 
pinnules, which are roughly opposite one another. All the branches curve upwards. 
The polyps are small and circular, 1 mm. in diameter, bearing short arms and having 
rather elongated mouths transverse to the long axis of the corallum. 
The spines (fig. 16 @) are stout, conical, and point sharply upwards; they are arranged 
somewhat irregularly in eight straight lines, but in many places are crowded together. 
They measure rather more than 0°1 mm. 
Locality. Providence, 50-78 fathoms. 
23. Antipathes irregularis, sp.n. (Figs. 17, 17a.) 
Portions of two colonies. In the larger there is a thick base 8 mm. wide and 
12 cm. long. Almost at right angles to this an arm arises, which in its turn gives off 
branches in a most irregular manner, some of these subsidiary branches being single 
while others in their turn subdivide. Probably the main stem in the living colony was 
continued, as there is a rough stump present. 
The polyps average 2 mm. in diameter and are round, the curves being rather short. 
There is, however, some irregularity, as on the smaller branches they are more elongated 
in shape and the arms are longer. They are distributed all round the stem. 
The spines (fig. 17a), which are arranged in seven distinct and very steep spirals, 
are small, sharp, and triangular, considerably compressed, and are separated from one 
another by rather more than a spine’s length. 
Locality. Diego Garcia, 14 fathoms (Sealark), 1-3 fathoms (Prof. G. C. Bourne). 
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