TRIBE I. — -ASTRyEACEA. 
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Plate 14, figs. 12 a, 12 &, sections of cells, of a specimen from the Feejees, 
I showing profile of lamellee, natural size ; 12 c, vertical section of the corallum, 
I natural size.— East Indies. Feejee Islands. — Exp. Exp. 
I 2. Meandrina spo.ngiosa (Dana). — Globose or hemispherical ; disks some- 
times quite simple, but usually linear and subgyrose ; gyri 3 to 4 lines broad, 
and rarely 2 inches long. Corallum very light cellular; ridges triangular; 
I fossae deep ; septa thin, but also often inflated ; lamellae rather distant, sub- 
acute at apex, subequal, very thin, delicately eroso-denticulate. 
Plate 14, fig. 17a, section of fossae and profile of lamellae. — West Indies.^ 
— Bost. Soc. JVat. Hist. 
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II, Gyri very long. 
\ 3. Meandrina labyrinthica (Ellis). — Hemispherical; linear disks very 
I long and gyrose ; gyri 3 to 4 lines broad. Corallum subcellular, firm ; ridges 
I triangular, subacute, nearly naked at top ; septa very slightly turgid ; lamellae 
I nearly even, denticulate, somewhat dilatate at base : in a transverse section, 
I septa solid, with rarely a cellule, scarcely 1 line thick. 
Plate 14, fig. 1, section of fossae and profile of lamellae. — The West Indies 
and Bermudas. The Red Sea, Ehrenherg. 
I 4. Meandrina strigosa (Dana). — Hemispherical ; linear disks very long, 
j gyrose ; gyri evenly 2i lines broad. Corallum cellular and rather light ; bottom 
1 of trench convoluto-porous : in a transverse section, septa filiform, hardly ^ of 
a line thick ; lamellae equal, very thin, numerous. 
Plate 14, fig. 4o, transverse section of corallum, natural size; 46, vertical 
section of same. — W est Indies ? 
5. Meandrina interrdpta (Dana). — Surface convex and undulate ; linear 
disks rather long (some very short and others long), often lobed and subgyrose, 
gyri 2-2f lines broad, somewhat unequal. Corallum firm ; fossse porous at 
bottom : in a transverse section, septa irregular, nearly a line thick, solid ; 
lamellae quite thin, alternately large and small, crowded, the smaller obsoles- 
cent. 
Plate 14, fig. 18, transverse section of corallum. — West Indies. 
6. Meandrina rustica (Dana). — Hemispherical; linear disks not long, 
gyrose ; gyri 2^ to 3 lines broad. Corallum cellular, firm ; fossae at bottom 
subcellular: in a transverse section, septa f of a line thick, lamellae rather 
stout, equal. 
Plate 14, fig. 5 a, transverse section of corallum, natural size ; 5 6, vertical 
section of same. — Wake’s Island, Pacific Ocean. — Exp. Exp. 
7. Meandrina valida (Dana). — Subhemispherical ; gyri tortuous and tor- 
tuously lobed, 3 to 4 lines broad. Corallum cellular, firm ; septa somewhat 
