TRIBE II. CARYOPHYLLACEA. 387 



crowded, branches smaller (2 to 3 lines), cells deeper, interstices 

 more porous. 



This description by Ehrenberg, was taken from a specimen eight 

 inches in height, in the Royal Museum, at Berlin. The locality is 

 not known. 



Oculina micranlhus, Ehrenberg, op. cit. G. xlviii. sp. 7. 



3. DENDROPHYLLIA NIGRESCENS. (Dana.} 



D. arborescens, 3' alia, ramis elongatis, fere in piano digestis ; nigre- 

 scens, ore longe exserto, et apice radiate striato, Iceteque virente cum 

 margine brunneo, tentaculis pallido-brunnescentibus. Corallum super- 

 fide subcelluhsum et non striatum, caliculis cylindricis vel subturbi- 

 natis,fere 3'" latis et 3-4'" longis, subfragilibus, cellis profundis. 



Arborescent, and 3 feet high, branches long, and nearly in a single 

 plane; almost black, with the mouths of the polyps long exsert, 

 green and radiately striate at summit, with a brown margin; 

 tentacles pale-brownish. Corallum with scattered pores over the 

 surface, and not striate, calicles cylindrical or subturbinate, nearly 

 3 lines broad, and 3 to 4 lines long, rather fragile, cells deep. 



Plate 30, fig. 1, branch, natural size; 1 , animal enlarged; 1 b, 

 tentacle ; 1 c, part of branch near extremity, showing the surface and 

 a calicle ; 1 d, vertical section of a calicle ; 1 e, transverse section, 

 near base of zoophyte; \f, ditto, near apex. 



Feejee Islands. Exp. Exp. 



This species has the general habit of the ramea, but the branches 

 are more slender and flexuous, and not striate. It retains the black 

 colour on drying, unless worn off by exposure, when it becomes white. 

 The specimen is three feet high, two inches in diameter at base, and 

 the upper branchlets one-fourth of an inch thick. The cells contain 

 nine to twelve large lamellae, and about three intermediate smaller, 

 which last are nearly obsolete at the summit of the branches. The 

 normal number of lamellae is forty-eight. A large specimen was 

 dredged up in fourteen fathoms water, by Lieutenant Emmons, and 

 others smaller were found by the author near the surface. 



