REPORT ON CORALS—DEEP-SEA MADREPORARIA. WGC 
Madracis. Many of the branchlets in the specimens are broken but, being traversed by 
flexible supports, remain 7n situ. In one specimen there are several instances in which 
a young calicle has been budded directly out of the mouth of an old one in the same 
direction. 
Extreme height of the largest specimen, which however is much reduced by 
breakage, 50 mm. Average breadth of the mouths of the calicles, 1-5 mm. Average 
height of the young calicles, 2 mm. 
Station 177. Off Api Island, New Hebrides. 63 fathoms. Three specimens. 
Bathelia, n. gen. 
Corallum arborescent, massive ; calicles disposed alternately in nearly straight rows 
on either sides of the several branches, with very prominent margins. Coenenchym 
white, compact, and dense, with its surface covered entirely by curved strive continuous 
with the coste. Calicles deep and widely open, with four cycles of septa, and a single 
crown of pali. Columella large, composed of numerous trabeculee. 
The genus is distinguished from Oculina by its single crown of pali, and the dis- 
tichous arrangement of the calicles; from Sclerohelia (Milne-Edwards and Haime’), it is 
distinguished by the costal striations, depth, and prominence of the calicles, and number 
of septa. 
Bathelia candida, n. sp. (Pl. VIII. figs. 1-6). 
The corallum is of a pure white; it is arborescent, with a tendency to assume an 
espalier form. The branches are rounded, and decrease very gradually in size towards 
-the summits. The ccenenchym is hard and dense, its surface is marked all over by 
curved longitudinal strize continued from the coste-at the margin of each calicle. 
Calicles oval in outline, being slightly compressed in a plane at right angles to the length 
of the branches, with very prominent margins disposed alternately and distichously on- 
the several branches as the result of alternate gemmation. Coste not very prominent, 
and present only at the very borders of the calicles. Septa slightly exsert, very little 
prominent from the wall of the calicle interiorly, so that the fossa is deep and widely 
open. Forty-eight septa present, that is to say, six systems and four complete cycles, 
but the primary, secondary, and tertiary septa are nearly equal. Twelve well-marked 
pali opposite the tertiaries. The fossee of the calicles are somewhat curved downwards 
towards the bases of the branches, and the septa are slightly curved in correspondence. 
The septa are thin, and covered on their faces with small pointed granules. Some of the 
pali are sometimes wanting, and appear sometimes to become lost amongst the trabeculee of 
the columella. The columella is large, composed of numerous vertical branched trabecule. 
1 MM. Milne-Edwards and Haime, Hist. Nat. des Cor., vol. ii. p. 112. 
(ZOOL. CHALL, EXP.—PART vil.—1880.) G 23 
