470 ZOOPHYTES. 



This is a neat slender species, with very short calicles, the branches 

 appearing almost naked. The specimen is about five inches high, 

 and is sparingly branched. 



41. MADREPORA CRIBRIPORA. (Dana.) 



M. arborescens, aut cespitoso-arborescens, late ramosa, ramis bene tereti- 

 bus, 4-5'" crassis, ramulis longis (inter dum 3"), subacutis, attenuatis. 

 Corallum scabriculum, porosissimum; caliculo apicali crasso (!-!'"), 

 prcebngo, striato; later alibus, brevissimv orbiculato-nariformibus, fra- 

 gilibus, paulum confertis, celld aperta, stella obsolescente, lamella una 

 interna conspicud. 



Arborescent or cespitoso-arborescent, spreading ramose, branches neatly 

 terete, 4 to 5 lines thick, branchlets long (some 3 inches), attenuate, 

 and subacute. Corallum scabrous, very porous; apical calicle stout 

 (1 to 1 lines), quite long, striate; the lateral very short, round-nari- 

 form, fragile, a little crowded, cell open ; star obsolescent, one inner 

 lamella prominent. 



Plate 31, fig. 1, zoophyte expanded, natural size; la, polyp en- 

 larged; 1 b, extremity of branch of corallum; 1 c, surface of corallum, 

 enlarged ; transverse section of branch, enlarged. 



Feejee Islands, about shallow parts of reefs. Exp. Exp. 



This is a neat species, growing in spreading branched clusters, 

 with long and terete branches and branchlets, very short fragile 

 calicles, and a long and large striated apical calicle. It is very porous 

 and breaks easily. It was found on a portion of the reef near Rewa 

 (Viti Lebu), where the waters are much freshened by the river which 

 empties near, and was almost the only species occurring on that part 

 of the reef. 



42. MADREPORA GRAVIDA. (Dana.) 



M. arborescens, maxima, late remoteque ramosa, ramis crassimis (1-2") 

 teretibus, apice sensim conicis, ramiculos semipollices conicos undique 

 gerentibus. Corallum caliculo apicali lato (1-1J'") tumidulo, non 



