110 THE VOYAGE OF H.M.S. CHALLENGER. 
ramosa, Milne-Edwards and Haime, seems to be very close to this species, and appears to 
correspond with the upright, narrow foliated form which results from the flexure of the 
frond, and the coalescence and upgrowth of the opposed surfaces. 
Locality.—Banda. 
2. Merulina prolifera, n. sp. (Pl. V. figs. 1-1a). 
Corallum small, ramose, with the branches very slender, much divided, closely crowded, 
and very coalescent ; forming dense, intricate clumps, covered above with dense clusters 
of small branchlets, which are angular, irregular, and often much flattened, alate, palmated 
and divaricate ; the branches are from 3 to 5 mm. thick, widening at the point of origin 
of the branchlets. The ridges are very small, narrow and elongated on the branches, and 
almost obsolete ; more distinct on the branchlets where they are much raised and very 
acute. The calicinal centres are very indistinct; the septa are narrow, closely placed 
and short on the branches, less crowded, long and broad on the branchlets, especially on 
the extreme apical parts, where they are very prominent. 
This species is close to the Merulina laxa, Dana, but differs in many characters. The 
specimen forms a clump about 11 em. in height and about the same in diameter. 
Locality. —Ternate. 
Family CyATHOPHYLLID&. 
Genus Moseleya, Quelch. 
Moseleya, Quelch, Ann. and Mag. Nat. Hist., vol. xiii, 1884, p. 292. 
Corallum compound, flattened, or slightly and broadly convex. Young calicles 
developing by calicinal marginal budding around a very large median calicle, which has 
very numerous septal orders, the calicles becoming polygonal and deep at the centre. 
Epitheca very slight, wall very thin and almost rudimentary, but developed so as to give 
a distinct, simple line of separation to the calicles on the surface, often interrupted, seen 
in section in a very rudimentary state separating the calicinal centres. Coste very 
distinct, thin, and finely denticulate. Septa often confluent and continuous from centre 
to centre in the line of union between adjoining calicles, very thin and close, finely 
toothed above, and having the teeth subequal or slightly larger near the centre. 
Endothecal dissepiments vesicular, very abundantly developed, leaving but a very small 
portion of the septa free exteriorly, except at the centre of the cup, which is thus much 
depressed ; they are often arranged in concentric circles, which are very distinct at the 
central portion, where by fusion and consequent thickening they form well-marked 
sub-infundibuliform tabule. A false columella is present, seen exteriorly to be formed 
