464 ZOOPHYTES. 



D. M. arborescentes, ramis ramiculos proliferos regulariter undique gerentibus. 



32. MADREPORA ECHINATA. (Dana.} 



M. arborescens, late remoteque ramosa, ramis -|" crassis, ramiculos 



polypiferos capiUares undique crebroque gerentibus. Corattum rami- 



culis capillaribus echinatum, super fide vix porosum ; ramiculis calicu- 



latis tubulatis et vix j|" longis, levibus, caliculis singulis -|" longis 



et %'" latis; stelld sex-radiatd bene conspicud. 



Arborescent, spreading, and remotely ramose, branches to J of an 

 inch thick, and covered evenly and crowdedly with capillary polyp- 

 bearing ramicles. Corallum with the surface scarcely porous ; 

 ramicles nearly | of an inch long, and consisting of a few thin and 

 smooth tubiform calicles; single calicles J to J of an inch long, and 

 f of a line broad, star six-rayed, and very distinct. 



Plate 36, fig. 1, corallum, natural size; 1 a, one of the ramiculi. 



Feejee Islands, and Sooloo Sea. Exp. Exp. 



The branches are very neatly bristled with the delicate branchlets, 

 and thus covered, have an even cylindrical outline, and are about two 

 inches in diameter. The whole zoophyte is sometimes two feet in 

 height, and is but sparingly branched, the branches being often six 

 inches long. 



33. MADREPORA CARDUUS. (Dana.) 



M. arborescens, echinatae affinis, ramis superne stride subdivisis, rami- 

 culis lateralibus polypiferis longioribus (1"), et crassioribus (1-2"'). 

 Corallum ramiculorum caliculo apicali tubiformi 1-1^'" longo, cali- 

 culis lateralibus appresso tubiformibus et orbiculato-nariformibus. 



Arborescent, near the echinata in habit, branches above, very closely 

 subdivided, lateral polypiferous ramicles longer (1 inch), and stouter 

 (1 to 2 lines). Corallum with the tubiform apical calicle of the 

 ramicles 1 to \\ lines long; the lateral calicles appressed-tubiform, 

 or round-nariform. 



