TRIBE I. ASTR^ACEA. 
29 
Plate 11, fig". 2, the polyps unexpanded ; 2 a, a few cells, natural size ; 2 b, 
vertical section of cell, with profile of the lamellae, enlarged ; 2 c, vertical 
section of corallum, natural size ; 2 d, transverse section. — Feejee Islands. — ■ 
Exp. E . p. 
22. Astra: A puteolina {Dana). — Hemispherical ; polyps | an inch broad. 
Corallum light cellular; calicles subpolygonal, a little prominent; ridges 2^ 
lines thick, rounded and sulcate ; cells deeper than broad, nearly perpendicular, 
scarcely coronate within ; lamellae even, finely denticulate. 
Plate 11, fig. 3, cells of corallum, natural size; 3 a, section of cells, show- 
ing profile of lamellae ; 3 6, vertical section, natural size. — East Indies. — Exp. 
Exp. 
23. Astra:a pallida {Dana). — Hemispherical ; polyps 6 to 8 lines broad, 
disk pale bluish-gray, tentacles whitish, the interior bursiform. Corallum open 
cellular ; calicles conico-cylindrical, 1-li lines high, contiguous, exterior re- 
motely lamello-striate and finely denticulate ; cells 5 to 6 lines broad, rather 
shallow, within coronate ; lamellae thin, narrow above and somewhat unequally 
exsert, sparingly dentate: in a transverse section, septa with large cellules in 
1 or 2 series ; stars scarcely multiradiate with the cellules sparingly decom- 
pound. 
Plate 10, fig. 13, natural size; 13 «, tentacles enlarged of the two series; 
13 &, cells in outline; 13c, vertical section of cell, with profile of lamellae and 
ridges; 13c', same, natural size; 13c/, transverse section of corallum; 13 e, 
vertical section of same. — Feejee Islands. — Exp. Exp. 
24. Astra:a dipsa cea (LamarcA:). — Convex, subhemispherical ; polyps often 
8 lines broad. Corallum light cellular; cells 4 to 6 lines broad, subangular 
and often lobed, rather deep, not coronate within; ridges subtruncate and 
sometimes slightly sulcate ; lamellae thin, lacerato-dentate, not crowded, nearly 
even: in a transverse section, stars many-rayed with the cellules decompound; 
septa a line thick, cellular, cellules large and in one or two series. 
Plate J I, fig. 4 a, vertical section of cell and ridges, showing profile of the 
lamellae and internal cellules, natural size ; 4 &, the same through the longer 
diameter of an oblong cell ; 4 c, vertical section of corallum, natural size ; 4 d, 
transverse section, natural size. — West Indies. 
25. Astra:a porcata {Esper). — Convex, subglobose ; dark chestnut-brown. 
Corallum cellular, rather firm ; cells 3 to 4 lines broad, rather shallow, short 
coronate within ; ridges nearly flat, obsoletely sulcate, 1 to 2 lines thick ; 
lamellaB even, incrassate, denticulate and very finely so at apex : in a trans- 
verse section, stars many-rayed, with the cellules decompound ; septa subcel- 
lular, cellules minute and scattered. 
