TRIBE III MADREPORACEA. 465 



Plate 36, fig. 2, corallum, natural size; 2 a, branchlets, ditto. 



Feejee Islands. Exp. Exp. 



This species resembles the echinata in habit ; but the lateral branch- 

 lets that surround and bristle the branches, make them from two and 

 a half to three inches in diameter, and the calicles which compose 

 them are also much shorter. The branches are subdivided above, 

 into a number of very close ascending branchlets. The surface of the 

 calicles is very finely striate 



The specimens in the collections are eighteen inches in height, 

 with a breadth of 2 to 3 inches below, and widening above, where the 

 branch subdivides, to 6 inches. 



34. MADREPORA ROSARIA. (Dana.) 



M. rectt arborescens, caulibus supra stride subdivisis, et lateraliter un- 

 dique ramiculosis, ramiculis creberrimis, valde obtusis, 3-4'" usque 

 ad apicem crassis, subteretibus, scepe proliferis. Corallum ramiculo- 

 rum caliculo apicali grandi (l-l"' crasso), paululum exserto; latera- 

 libus validis, breviter nariformibus, compressis, striatis, interdum 

 subseriatis, stelld 12-radiatd conspicua. 



Erect arborescent, stem above closely subdivided, and throughout 

 laterally ramiculose ; ramicles much crowded, very obtuse, 3 to 4 

 lines thick even at apex, subterete, often proliferous. Corallum 

 having the apical calicles of the ramicles large (1 to l lines broad), 

 a little exsert; the lateral stout, short, and compressed-nariform, 

 striated, sometimes subseriate ; star 12-rayed, distinct. 



Plate 36, fig. 3, corallum, natural size ; 3 a, branchlet, natural size. 



Feejee Islands. Exp. Exp. 



The crowded ramicles are so evenly clustered around the erect 

 stem that the whole has a cylindrical shape, and is about fifteen inches 

 high and four in diameter. The lateral calicles have a very thick 

 margin, and many of them are proliferous. The ramicles are about as 

 large at the obtuse apex as below, and the cluster of calicles which 

 constitutes the extremity has a rosette appearance. 



117 



