TRIBE I. AS TRIAGE A. 327 



glass. These lamella? are extremely neat, more finely granulous on 

 the lateral surface than in the formosa, and much thinner than in 

 the prcetorta. The specimen affording the description belongs to the 

 collections of the Boston Natural History Society. 



9. PAVONIA DIVARICATA. (Lamarck.} 



i 



P. cespitosa, plano-hemispherica ; foliis bifrontibus, valde subdivisis, 

 lobis carinato-angulatis, Jlexuoso-divaricatis, crebris et crassis, J " 

 latis. Corallum lamellis subconfertis, oririmis scepe linearibus. 



Cespitose, piano-hemispherical; folia bifacial, very much subdivided, 

 lobes carinato-angular, and flexuoso-divaricate, crowded and stout, 

 J to ^ an inch broad. Corallum with the lamellae rather crowded, 

 oririmes often a line long. 



Plate 22, fig. 6, natural size. 



Indian Ocean. Lamarck. Feejee Islands. Exp. Exp. 



The upper surface of a clump of this species, presents closely 

 crowded angular lobes, with sharp edges and summits. A branch 

 separated from the clump appears irregularly short-palmate and much 

 crisped, the lobes twisting in every direction. The clumps are often 

 a foot or more in diameter. 



Pavonia divaricata, Lamk., ii. 378, No. 5. Pavonia divaricata, Blainv., Man., 365. 

 , Deslongchamps, Encyc., 605. 



10. PAVONIA BOLETIFORMIS. (Lamarck.} 



P. subhemispherica ; foliis bifrontibus, tenuibus, lobatis, undulatis, sub- 

 crispis, lobis 1" raro super antibus, margine acutis et scepius sinuosis. 

 Corallum superficie non carinata ; lamellis laxis ; oririmis scepe ses- 

 quilinearibus. 



Subhemispherical; folia bifacial, thin, undulate or somewhat crispate, 

 lobed, lobes rarely exceeding an inch in breadth, with the margin 

 acute and usually sinuous. Corallum with the surface even and 

 not carinate ; lamellae lax ; oririmes often l lines long. 



