100 
TRIBE III. MADREPORACEA, 
rarely coalescing ; polyps in 4 to 6 series, greenish. Corallum with the branch- 
lets subulate^ ramuloso-verrucose above, and 4 to 6-winged at summit. 
The Red Sea and East Indies. 
2. Seriatopora lineata (Esper,) Schweigger. — Branches quite stout, 3 
lines thick at base, slenderly subulate at apex, and not verrucose. Corallum 
six-winged at summit, cells slightly vaulted, i of a line broad. 
Red Sea. — Ehrenberg. 
3. Seriatopora hystrix [Dana). — Branches stout, below, 3 lines thick, 
often coalescing ; branchlets conically subulate and acute, 2 lines thick ; 
polyps in 8 to 10 series, tentacles rose-red. Corallum with the branchlets not 
winged at summit ; cells vaulted, ^ of aline broad; below, cells sometimes 
scattered, 
Plate 49, fig. 3, central part of a hemispherical clump, natural size ; 3 a, 
from the outer part of the same; 3&, part of a transverse section, enlarged. — 
Feejee Islands. — Exp. Exp. 
4. Seriatopora octoittera [H. ^ Ehrenberg). — Branches rather slender 
(scarcely 2 lines thick), below, often coalescing ; polyps in 6 to 8 series, 
greenish. Corallum with the branchlets rather obtuse at apex, 6 or 8-winged, 
cells slightly vaulted. 
Red Sea, Ehrenberg. — Singapore and Sooloo Sea, Exp. Exp. 
5. Seriatopora caliendrum [H. ^ Ehrenberg). — Branches 2 lines thick 
at base, minutely asperate, intricate and coalescing ; branchlets very slender, 
with finely subulate extremities. Corallum with the cells not vaulted ; apex 
of the branchlets 6-winged. 
Red Sea. — Ehrenberg. 
Genus IY.— POCILLOPOEA.— Lamaeck. 
Furcato-ramose ; coral secretions of the interstices nearly 
solid ; branches never terete, often verrucose ; cells contiguous, 
and at apex angular, the lamella very narrow, and generally 
rather indistinct. 
I. Slenderly branched, not verrucose. 
1. Pocillopora acuta [Lamarck). — Hemispherically shrubby-cespitose, 
much branched; branches 2 to 4 lines thick, subterete, flexuous; upper 
branchlets 1 to 1^ lines thick, rather distant, subacute, half an inch long. 
The Pacific and Indian Oceans. Feejee Islands and Sooloo Sea. — Exp. 
Exp. 
