TRIBE III. MADREPORACEA. 545 



long, even, flexuous, divaricate, branchings. It is probably from the 

 West Indies. 



31///epora alcicornis, var. /3. ramosa, Pal- terete branches and size of that described 



las, Zooph., sp. 15 ; Esper, Pflanz., i., 198, above, but they are in a single plane ; it 



tab. 7 ; this figure represents a specimen may be only a variety of the alcicornis. 

 from the West Indies, having nearly the 



3. MILLEPORA PUMILA. (Dana.) 



M. pumila (1-2"), cespitosa, gracillime palmato-ramosa, ramis ferme 

 l"' latis, ramulis plerumque rectis et simplicibus, truncatis, tenuibus, 

 scepius " longis, et brevioribus. 



Small (1 to 2 inches), cespitose, slenderly palmato-ramose, branches 

 about one and a half lines broad ; branchlets mostly straight and 

 simple, truncate, slender, many $ an inch long, others very short. 



Plate 52, fig. 4, corallurn, natural size. 



The Harbour of Carthagena, East Coast of South America. T. R. 

 Peak. 



This is a small and neat species, forming wide-spreading clusters of 

 flat palmate branches, nearly erect, an inch or two long, and delicately 

 fingered. 



4. MILLEPORA TORTUOSA. (Dana.) 



M. cespitosa, tenuiter ramosissima, ramis compressis, plerumque subdi- 

 gitatis, scepe crebro intricatis et tortuosis, inter dum in laminas reticu- 

 latas digestis ; ramulis Jlexuosis l-2"' latis, compressis, obtusis, non 

 acuminatis. CoraUi cellis minutissimis. 



Cespitose, much and slenderly ramose, branches compressed, mostly 

 subdigitate, often crowdedly intricate and tortuous, sometimes in a 

 single plane and reticulately coalescent; branchlets flexuous, 1J to 

 2 lines broad, compressed, obtuse, not acuminate. Corallum with 

 the cells very minute. 



Plate 52, figs. 3, 3 a, different varieties, natural size ; 3 b, extremity 

 of branch, showing the minute cells. 



137 



