326 ZOOPHYTES. 



curvatis et ampliter subcrispis. Corallum foliis tenuibus, (infra 

 1J-2'"), margine sapius acutis ; oririmis semilinearibus, stzpe. trans- 

 versim seriatis, inter slitiis obsolete convexis, et 1-1 J'" latis ; lamellis 

 subtilissimis, confertissimis, alternis vix minoribus. 



Cespitoso-hemispherical ; folia thin, bifacial, lobato-subdivided, curved 

 and broadly subcrispate. Corallum with the folia thin (below 1 J to 2 

 lines thick), at the margin usually acute; oririmes J a line long, often 

 transversely seriate, with the interstices a little convex, and 1 to 1 

 lines broad ; lamelke very delicate, much crowded, the alternate 

 scarcely smaller. 



Plate 24, fig. 2, part of a hemispherical clump, natural size. 



Tahiti, Society Islands. Exp. Exp. 



This species grows in hemispherical clumps, like the prcetorta, but 

 the folia are mostly straight radii to the clump, curving or crispate 

 laterally, and not contorted in every direction ; and the curves are 

 large. The oririmes are also larger and more open, and the inter- 

 stices between series, more raised. It appears to be near the cactus 

 of Ehrenberg. 



8. PAVONIA VENUSTA. (Dana.} 



P. cespitoso-hemispherica ; foliis gracilibus, bifrontibus, kbato-subdivisis, 

 curvatis et valde crispis. Corallum foliis tenuioribus, oririmis par- 

 vulis scepe %'" superantibus, inter stitiis omnino plants, s&pe 2"' latis ; 

 lamellis subtilissimis alternis valde minoribus. 



Cespitoso-hemispherical ; folia thin, bifacial, lobato-subdivided, curved 



and strongly crispate. Coralla with the folia thinner than in the 



formosa; oririmes quite small, often exceeding a little half a line ; 



interstices throughout flat, often 2 lines in breadth ; lamellee very 



delicate, the alternate much smaller. 



This species in the general form of its folia is intermediate between 

 the formosa and prcetorta. The interstices between different oririmes 

 or lines of oririmes are mostly broader and quite flat, with the alter- 

 nate lamella? so unequal that the smaller are scarcely seen without a 



