TRIBE III. MADREPORACEA, 
81 
11. Madrepora millepora (Ehrenbei'g^) Dana.—^hort pedicellate cespi- 
tose, broad, a little convex, branches openly reticulato-coalescent ; below, a 
feiv naked branclilets appressed into the plane of the frond ; above, branch^ 
lets very evenly terete, 2 inches long and scarcely ^ of an inch thick, nearly 
simple. Coralluin with the branchlets obtuse, calicles short labellate, crowded 
imbricate, i a line broad, star indistinct, two of the lamellge very prominent ; 
apical calicle nearly a line broad and ^ a line exsert; calicles of the marginal 
branchlets very much spreading. 
Plate 33, fig. 2, part of corallum, natural size; 2a, branchlet, ditto. — East 
Indies, where it is common. — Exp. Exp. 
12. Madrepora prostrata [Dana]. — Cespitose, prostrate, with a flat top, 
branches remotely coalescing ; below, not flattened, branchlets few, and cells 
all immersed ; above, branchlets neatly cylindrical, nearly simple, ^ of an 
inch thick : polyps green, and having one of the tentacles much longer than 
the others. Corallum having the branchlets obtuse, the apical calicle short, 
four-fifths of a line broad ; other calicles crowded, labellate, broad and spread- 
ing, with the lip much flattened ; cells stellate, two of the lamellge a little the 
broadest. 
Plate 33, fig. 1, part of corallum, natural size ; 1 a, one of the polyps, en- 
larged ; 1 h, same, partly expanded, an upper view ; 1 c, branchlet, natural 
size ; 1 d, calicles, enlarged ; 1 e, same in profile ; 1 f, transverse section of 
branch, enlarged. — Feejee Islands, and Sooloo Sea. — Exp. Exp. 
13. Madrepora sdbulata [Dana). — Prostrate, plane above; branches 
loosely intricate, and remotely coalescing, ramose, i an inch thick ; below, 
branchlets few, nearly naked, and appressed into the plane of the frond ; above, 
branchlets every where terete, subulate, a little undulate and subacute, 2^ 
inches long and 2 to 3 lines thick, nearly simple. Corallum having the cali- 
cles labellate, but quite small and very short or scarcely prominent, those of 
the marginal branchlets more spreading and somewhat larger ; star obsolete, 
two lamellae quite broad ; apical calicle very exsert (1 line), nearly or quite | 
of a line broad. 
Plate 33, fig. 3, part of corallum, natural size ; 3 a, branchlet, natural size. 
— The East Indies. — Exp. Exp. 
14. Madrepora convexa [Dana). — Broad cespitose and short pedicellate, 
convex above, branches nearly horizontal, reticulato-coalescent ; below flat- 
tened with a few naked subangular branchlets ; above branchlets of the cen- 
tral portions terete, rarely angular, nearly simple, sometimes proliferous, 2 to 
2i inches long, and i of an inch thick ; the marginal branchlets rudely acer- 
vato-proliferous. Corallum with the apical calicle short, cylindrical, four- 
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