TRIBE III. MADREPORACEA. 
85 
Plate 34, fig. 43, branclilet, natural size. — Singapore, East Indies. — Exp. 
Exp. 
29. Madrepora valida [Dana). — Cespitose, branchlets subdigitiform, 
very uneven, 2i inches long and 6 to 8 lines thick, rudely proliferous, polyps 
quite large. Corallum having the lateral calicles unequal, appressed-tubiform, 
very stout, and large, 2 to 4 lines long, and 1 line broad, exterior smooth; star 
rather distinct, two of the lamellee meeting below. 
Plate 35, fig. 1, corallum, natural size. — Feejee Islands. — Exp. Exp. 
30. Madrepora retdsa {Dana^. — Cespitose, small, convex, branchlets 
digitiform, i an inch thick, 2^ inches long, not terete, truncate at summit. 
Corallum having the lateral calicles crowded and acervate at the summit of 
the branchlets, very unequal, some 3 lines long and others obsolete inter- 
spersed, appressed-tubiform and slender, lip elongate, exterior smooth ; aper- 
ture often oblong, star scarcely distinct. 
Feejee Islands. — Exp. Exp. 
31. Madrepora ramiculosa [Dana). — Subfastigiate, close ramose, and 
very minutely subdivided into branchlets ; ramicles much crowded, subterete, 
1^ to 2 lines thick. Corallum slightly porous, smooth; apical calicle nearly 2 
lines prominent, and often over a line in breadth ; the lateral, remote, short, 
round-nariform, rather stout ; cells of the branches immersed, and having a 
very distinct star. 
Plate 35, fig. 4, part of a branch of corallum, natural size ; 4 a, extremity of 
a branchlet, natural size. — Feejee Islands. — Exp. Exp. 
32. Madrepora echinata (Dana). — Arborescent, spreading, and remotely 
ramose, branches ^ to f of an inch thick, and covered evenly and crowdedly 
with capillary polyp-bearing ramicles. Corallum with the surface scarcely 
porous ; ramicles nearly f of an inch long, and consisting of a few thin and 
smooth tubiform calicles; single calicles i to f of an inch long, and f of a 
line broad, star six-rayed, and very distinct. 
Plate 36, fig. 1, corallum, natural size; la, one of the ramiculi. — Feejee 
Islands, and Sooloo Sea. — Exp. Exp. 
33. Madrepora carduus [Dana). — Arborescent, near the echinata in 
habit, branches above, very closely subdivided, lateral polypiferous ramicles 
longer (1 inch), and stouter (I to 2 lines). Corallum with the tubiform apical 
calicle of the ramicles 1 to H lines long; the lateral calicles appressed-tubi- 
form, or round-nariform. 
Plate 36, fig. 3, corallum, natural size; 2a, branchlets, ditto. — Feejee Isl- 
ands. — Exp. Exp. 
34. Madrepora rosaria [Dana). — Erect arborescent, stem above closely 
subdivided, and throughout laterally ramiculose; ramicles much crowded, 
