130 BULLETIN OF THE 



like (olds of tlie wall, joined with each other at a little distance below the 

 edge of the calicle, and thus forming pitlike interseptal chambers. Each one 

 of these chambers encloses a small secondary septum in the shape of a dense 

 vertical fringe of small points resembling hairs, which, when seen foreshort- 

 ened fi'oni above, appears like a small columella.* Columella deep sunk, 

 rounded, and hirsute. Color white, with a delicate pink blush when fresh. 

 Dimensions, 4 to G inches in length and breadth of flabellum. Rather 

 common between 120 and 324 fathoms oil' the Florida reef. 



Some of the branches are thickened ami hollow, with openings near the 

 end; and the cavities are inhabited by annelids, as has also been noticed by 

 Professor Verrill, in Allojpora californica. In our specimens the tube seems 

 to be entirely formed by the coral, the annelid contributing nothing himself. 



Allopora miiriata Pourt. 



Corallum branching, flabellate, the main trunk rather massive and flat- 

 tened. Surface finely and sharply granular. Branchlets thick ami obtuse. 

 Calicles irregularly but densely distributed on one surface of the branches, 

 becoming obsolete on the main trunk. Small ampulla- abundant between 

 the calicles on the younger branches. Calicles slightly prominent about 

 half a. line in diameter, fossa, deep, columella spherical, deeply immersed, 

 hirsute. Septa, from seven to ten, generally eight, formed as in Slylaster 

 erulescens, but the enclosed secondary septa are much larger and distinct, 

 giving the appearance of a calicle surrounded by a number of smaller ones, 

 all provided with columella;. The edge of the calicle and of the folds is 

 Crowded with small sharp points. 



The branches seem to have grown in a horizontal trailing manner, as the 

 lower surface often shows signs of contact with foreign bodies. 



Color brick red ; length, 5 or G inches; breadth, :3 or 4 inches. Dredged 

 in depths from 100 to 324 fathoms oil' the Florida reef, not as frequently as 

 Stylasft r t rubt set ns. 



This species is the most massive of our deep-sea corals; it undoubtedly 

 belongs to the genus Allopora as defined by Milne-Edwards & Haiine, if 



# This nrrai menl is particularly apparent in Allopora miniata wxt described, where 



firs! noticed. It is very distinct also in Sti ' ■ '< r co <iplanalus Pourt. I have seen 



i in St. roseus, Edw. & Haimc, elegans, Verrill, tenuis, Verrill, and Allopora caU- 



'. Verrill (very distinct); but 1 failed to see the small septum in Allopora bella, 



Dana, where it i probably more deeply seated, as is the small columella. The character 



, i interseptal chambers, containin nail secondary (or tertiary?) septa, 



ncral, I see no ncce -i'\ for separating tin nus Cyclopora, Verrill, from the 



; ftrs. This character, furthermore, unites still morecloselj the genera Slylaster 



and D ; in Errina, also, the pores mistaken by Gray for calicles are probably 



only interseptal chambers, soon separated from the calicle by the irregular growth of 

 hyma. 



