566 ZOOPHYTES. 



The columnar masses are lobed above, and deeply erose. The spe- 

 cimen in the collections is three inches high, and four in diameter, 

 with a nearly flat summit. The sides are much less uneven than in 

 the monticulosa, the summits more flat, and the granules of the inter- 

 vals between the stars are not similar to the granules of the cells. 



22. PORITES MONTICULOSA. (Dana.) 



P. arrecto-glomerata, cohmmiformis, et lobata, apice rotundato-truncata ; 

 superjicie undique angulatt erosd out monticulosd, monticulis laterali- 

 bus crebris scepe subtriangulatis et ascendentibus, nunquam in carinas 

 digestis, apicalibus paulo minoribus ; polypis brunneis, labris semilu- 

 nate lutescentibus, tentaculis obsoletis albidis. Corallum cettis nullis, 

 stettis vix conspicuis, pord centrali minutissimd. 



Stout erect glomerate, columniform or erect lobed, apex round-trun- 

 cate ; surface every where angularly erose or monticulose ; lateral 

 monticles crowded, often subtriangular and ascending, never coa- 

 lescing into carinate ridges, the apical a little smaller ; polyps brown, 

 the lips semilunate and yellow, tentacles whitish, obsolete. Co- 

 rallum with no cells, stars scarcely distinguishable, central pore 

 very minute. 



Plate 55, fig. 7, corallum, natural size ; 7 a, polyps, enlarged; 7 b, 

 cells, enlarged ; 7 c, part of a transverse section, ditto. 



Feejee Islands. Exp. Exp. 



The specimen in the collections is five and a half inches high, and 

 four and a half by three in breadth at base. The columniform lobes are 

 one to three inches in diameter, and two inches or so long, and have 

 nearly rounded summits. 



D. Tenuiter incrustantes. 



23. PORITES LICHEN. (Dana.} 



P. incrustans, J" crassa, undulata, margine subacuto, scepe revoluto, et 

 paulum libero, superficie infernd levi aut obsolete plicatd. Corallum 



