Corals from the China Sea . 
363 
Genus Seriatopora, Lam. 
Seriatopora gracilis , Dana. 
1848. Seriatopora caliendrum , var. gracilis , Dana, U. S. Explor. Expe- 
dition, Zoophytes, p. 522, pi. xlix. fig. 4. 
1875. Seriatopora gracilis , Dana, Corals and Coral Islands, p. 334. 
There are three fragmentary specimens which do not fully 
agree with Dana’s description ; but the differences do not 
appear sufficient to justify placing them in a new species. 
They form bushy masses of very slender branches from 2*5 to 
3 millim. in thickness in the lower part, the terminal branch- 
lets acutely pointed, slightly winged at their apices, from 2 to 
5 millim. long and about 1 millim. thick at the base. 
Branches round to subangular, divergently bifurcating in 
lower portions of the colony and giving off antler-like spikes. 
Calices in five series, circular to oval, from *4 to *5 millim. in 
width, sometimes without prominent lips, at others the upper 
lip projecting ; distance from each other in rows variable, 
from *3 to *6 millim. ; there are from five to six calices in a 
length of 5 millim. Septa not recognizable, columella visible 
but not prominent. Spaces between the rows abundantly 
covered with acute spines. 
From Dana^s figured type these specimens differ in the less 
upright and more divergent mode of growth and the slightly 
winged apices of the branchlets. They differ materially from 
the form referred by Quelch to this species (‘Challenger’ 
Deport, vol. xvi. p. 58), which has calices of about twice the 
size mentioned by Dana. 
Macclesfield Bank, 20J fatli. 
Seriatopora imbricata , sp. n. 
Corallum forming fairly large bushy masses ; branches 
dichotomizing at intervals, occasionally a distance of 15 
millim. between the furcations, branches sometimes coalescing. 
The summit-branches furcating and giving off short, pointed, 
divergent apical spikes, not winged, about 2 millim. thick at 
their bases. Branches in lower portion about 4 millim. in 
thickness, distinctly subangular, the calices in five series on 
the angles. Calices transversely suboval, with their upper 
lips very prominent and strongly arching over the aperture, 
very spinous ; in the lower branches the upper lip hardly at 
all developed. The calices about *6 millim. in diameter, very 
closely arranged in the rows, so that there are seven in the 
space of 5 millim. The interspaces between the calices flat- 
tened, sometimes 1 millim. in width, closely covered with 
