TRIBE III. MADREPORACEA. 525 



The Pacific and Indian Oceans. Feejee Islands and Sooloo Sea. 

 Exp. Exp. 



A slenderly branched species, approaching the Seriatoporae in ge- 

 neral habit, but not evenly terete, nor seriate in its cells. It forms 

 rather lax hemispherical clumps, six inches in diameter, the branches 

 of which are about half an inch apart, and, except at base, are scarcely 

 a fourth of an inch thick. 



Madrepora Candida ramosa, Damcecornua , Pallas, Zooph., 334, var. y. 



deferens foraminibits rotundatis in super- Pocillopora acuta, Lamk.,ii., 442, No. 1. 



Jicie insignila, Gualtieri Ind., back of tab. , Deslongchamps, Encyc., 630. 



104. , Blainville, Man., 398. 



Mad. damicornis, Ellis and Sol., 170. , Ehrenberg, G. Ixxv., sp. 2. 



The Forties subseriata of Ehrenberg, from the Red Sea (G. Ixx., sp. 8), appears to 

 belong to this genus, and to have some relations to the above. It is thus described: " Ra- 

 mis attenuato-subulatis, subacutis (obtusis), teretiusculis, stellulis subseriatis, margine 

 superiore parumper fornicato, nee dentato paulo prominulis, semilinearibus. Habitus 

 SeriatoporEe." 



A specimen from the Feejees agrees nearly with this description. It is more slenderly 

 and more openly branched than the acuta of the East Indies, and moreover the cells are 

 sometimes a little seriate. Yet it is probably only a variety. 



II. Bene cespitosce,fu,rcato-ramos<z out subdivisce; ramis verrucosis. 



2. POCILLOPORA CESPITOSA. (Dana.) 



P. humilis, cespitosa, crebro ramosissima, bene convexa, ramis breviori- 

 bus, tortuosis, 2-3'" crassis et basi grandioribus ; ramulis extremis 

 verruciformibus, 2'" longis et scspe subacervatis. Corallum ceUisgran- 

 dibus (i'"), Stella columellaque obsoletis. 



Low and even-topped cespitose, much and crowdedly branched, 

 branches much shorter than in the acuta, tortuous, 2 to 3 lines thick, 

 and stouter at base ; summit branchlets verruciforrn, 2 lines long, 

 and often subacervate. Corallum having the cells large ( a line 

 broad), and without star or columella. 



Plate 49, fig. 5, part of a clump, natural size; 5 a, extremity of a 

 branch, natural size. 



132 



