444 



ZOOPHYTES. 



an inch long, one and three-fourths to two lines thick at base, with in- 

 tervals between of but a fourth of an inch; and they are crowdedly and 

 evenly covered with small thin calicles. The branches of the frond 

 are very closely coalescent, with the open intervals about one-eighth 

 of an inch wide. The specimen is a shallow vase, one foot in diame- 

 ter, and belongs to the Boston Natural History Society. 



LitJwdendrum cakareum sessile, Rumph. 

 Amboyn., pi. 86, fig. 2. 



Madrepora corymbosa, in part, of Lamarck. 



The Heteropom microclados, of Ehrenberg, 

 (op. cit. Gen. Ixix., sp. 4), as described, 

 is not far from the above species ; but his 

 queried reference to Ellis's figure, plate 

 57, a shrubby species, would imply 



that it is quite different. It is thus de- 

 scribed : " Pedalis, prostrata, repens, ra- 

 mosa, ramis reticulato-coalitis, horizontali- 

 bus, ratnulis erectis, spiniformibus, semi- 

 pollicaribus ct pollicaribus, divisis, apice 

 tubuloso-asperis, stellis levibus hispidisve, 

 semilinearibus, myxatis, striatis, apicali- 

 bus I'" latis, integris." 



9. MADREPORA HYACINTHUS. (Dana.) 



M. vasiformis, pedicellata, fronde 1-1 \" crassd, ramis parce coalitis ; 

 infra ramulis crebris divaricatis, J-" longis, scspe proliferis ; supra 

 ramulis gracilibus (^"),fere simplicibus, totidem proliferis, -f" elon- 

 gatis. Corallum caliculis tubo-labellatis, crassioribus, 1-1J'" longis, 

 labello non minime complanato, cellis apertis ; stelld inconspicua ; 

 apicali cylindrico, prominulo. 



Vasiform, pedicellate, frond 1 to 1J inches thick, branches sparingly 

 coalescent ; below, branchlets crowded and spreading, J to inch 

 long, often proliferous ; above, branchlets slender (^ of an inch 

 thick), nearly simple, sometimes proliferous, to f of an inch long. 

 Corallum having the calicles tubo-labellate, not fragile, 1 to 1J 

 lines long, lip not at all flattened ; cells open with an indistinct star, 

 apical calicle cylindrical, prominent. 



Plate 32, fig. 2, fragment of corallum, natural size, showing the 

 character of the upper and under surface. 



Feejee Islands. Exp. Exp. 



This species has some resemblance to the spicifera, but the nu- 

 merous branchlets of the under surface, directed obliquely downward, 

 as well as the stouter calicles, somewhat tubiform, and much firmer, 

 afford striking distinctive characters. The branchlets of the corallum 



