TRIBE III. MADREPORACEA. 547 



6. MILLEPORA COMPLANATA. (Lamarck.} 



M. htissime lamellata, levis ; frondibus erectis, planis, apice paulum 

 divisis, subplicatis, rotundato-truncatis. 



Very broad lamellate, smooth; fronds erect, surface plane, apex some- 

 what subdivided, subplicate, round-truncate. 



West Indies. Lamarck. 



According to Lamarck, this is a very large and broad foliaceous 

 species. Milne Edwards states that it hardly differs from the alci- 

 cornis, except that the cells are more numerous and crowded. 



Millepora complanata, Lamarck, ii. 307, Palmipora complanata, Blainv., Man., 391. 



No. 2. The M. complanata, of Ehrenberg, (G. 



Millepora alcicornis, var. y, Pallas, Zooph. Ixxiv., sp. 2,) from the Red Sea, is near 



261. this species. 



7. MILLEPORA SQUARROSA. (Lamarck.} 



M. subfamellata, frondibus erectis, basi verrucosis ; lateribus verticaliter 

 lamellosis, lamellis subremotis. 



Sublamellate, fronds erect, verrucose at base ; sides vertically lamel- 

 liferous, lamellse subremote. 



Lamarck states that this species differs widely from the complanata 

 in having its fronds contorted, and with prominent longitudinal plates 

 growing from the lateral surfaces. The American seas are mentioned 

 as the probable locality. 



iS. incrassata. Under this name we notice specimens obtained at 

 Raraka, in the Paumotu Archipelago, Pacific Ocean, which may be a 

 new species, though hardly distinguishable from Lamarck's species 

 by the description given. The following are its characters (plate 53, 

 figure 1). 



Incrusting and forming erect sublamellate fronds, short and stout 

 and subacute from a thick base (two to four inches high and two-thirds 



