348 ZOOPHYTES. 



even, with deep cells, subangular, sometimes lobed, a line broad, 

 sometimes 3 lines long (and then containing 3 polyps) ; ridges 

 rounded. 



Plate 25, fig. 1, corallum, natural size; 1 a, cell; 1 b, sectional 

 view. 



Feejee Islands. Exp. Exp. 



A stout massive species, six inches through at base, growing to a 

 height of two feet, with the erect branches or subdivisions often seve- 

 ral inches long, the whole clump having a flat top. The smaller lobes 

 not reaching the level of the top, are sometimes rounded above. 



5. PSAMMOCORA EXESA. (Dana.) 



P. erecta, crassima, subdivisa, lobis erectis et crebris, subcylindricis, 

 1-3" crassis, superfaie sape gibbosd, apice rotundatd vel subtrun^ 

 cata ; cellis !"' latis, irregularibus, fere superficialibus et scepe male 

 diffluentibus, excavata, collibus obsolescentibus : brunneo-purpurascens, 

 tentaculis nullis. 



Erect, very stout, subdividing above, lobes erect and crowded, sub- 

 cylindrical, 1 to 3 inches thick, surface uneven and often gibbous, 

 apex rounded or subtruncate; cells 1J lines broad, irregular, nearly 

 superficial, often imperfectly diffluent, ridges obsolescent : colour 

 purplish-brown, tentacles none. 



Plate 26, fig. 1, corallum, natural size; la, animals enlarged; 1 b, 

 a cell magnified ; 1 c, sectional view of interior. 



Feejee Islands. Exp. Exp. 



This species, in its massive columnar forms, resembles the last, but 

 the surface is very uneven, the top less flattened, and the cells nearly 

 superficial with less distinct limits. A specimen in the collections is 

 four inches through at base, a foot high, with the erect lobes or sub- 

 divisions several inches long and one to three in diameter. Like the 

 other Psammocora?, the surface has an arenaceous or sanded appear- 

 ance to the naked eye. 



