86 
TRIBE III. MADREPORACEA, 
very obtuse, 3 to 4 lines thick even at apex, subterete, often proliferous. Co^ i 
rallum having- the apical calicles of the ramicles large (1 to lines broad), 
a little exsert ; the lateral stout, short, and compressed-nariform, striated, some- 
times subseriate ; star 12-rayed, distinct. ^ 
Plate 36, fig. 3, corallum, natural size; 3a, branchlet, natural size. — Feejee 
Islands. — Exp. Exp. 
35. Madrepora FLORIDA {Dana). — Arborescent, very large, broad and 
remotely ramose, branches IJ inches thick, gradually tapering, bearing over ' 
the surface small clusters of polyps. Corallum covered with calicular tuber- ® 
cles ^ of an inch broad, calicles unequS,!, very short tubiform, rather stout, 
striated ; some tubo-nariform, with immersed cells interspersed ; star 6-rayed, 
distinct, two of the lamellse not more prominent. 
Plate 37, fig. 1, corallum, natural size. — Feejee Islands. — Exp. Exp. 
36. Madrepora implicata {Dana). — Cespitoso-arborescent, closely ra- 
mose, branches crowded, curved, and tortuously entangled, often coalescing, 
slenderly attenuate ; stems i of an inch thick, branchlets one-sixth of an inch. 
Corallum scabrous and striated with linear pores ; apical calicle cylindrical, | 
four-fifths of a line in diameter ; the lateral obsolete below two inches from 
the summit, above this, short, round, nariform, and fragile, scattered ; star ob- 
solescent. 
Plate 37, fig. 2, part of corallum, natural size ; 2 a, part of section of branch, 
enlarged. — Feejee Islands. — Exp. Exp. 
37. Madrepora tortuosa {Dana). — Cespitoso-arborescent, close-ramose, 
branches crowded, often coalescing, a little tortuous, below, ^ an inch thick, 
branchlets often 2 inches long, and 2 to 4 lines thick, acuminate and subacute. 
Corallum having the surface scabrous, but not at all striate; apical calicle fi 
of aline long and broad ; the lateral below 3 inches obsolete; above, short 
round-nariform, fragile; star obsolescent, two of the lamellae but slightly 
prominent. 
Plate 37, fig. 3, part of corallum, natural size. — Feejee Islands, — Exp. Exp. 
38. Madrepora aspera {Dana). — Arborescent, spreading, ramose, branches 
terete, ^ an inch thick, summits conical and proliferous. Corallum quite po- 
rous, surface scabrous ; apical calicle stout (1^ lines), a little prominent ; the 
lateral short labellate, fragile, divaricate, not crowded, many obsolete, cells 
quite large, star very short-rayed, two of the lamellse prominent. 
Plate 38, fig. 1, branch, natural size ; 1 a, polyp, enlarged ; 1 6, part of sec- 
tion of branch, enlarged. — Feejee Islands. — Exp. Exp. 
39. Madrepora hebes {Dana). — Arborescent, spreading ramose, prolifer- 
ous at apex ; branches neatly terete, 4 an inch thick, very obtuse. Corallum 
having the apical calicle very broad (14 to 2 lines), a little tumid, but scarcely 
