TRIBE I. ASTR^EACEA. 343 



Mad. agaricites, Linn. Ed. xii., 1274. , Ellis and Solander, 159, tab. 63; 



, Pallas, Zooph., 287 ; the descrip- the figure is not good, if intended to re- 



tion by Pallas, and also that in Linnaeus, present this species. 



applies even better to the cristata than to Pavonia agaricites, Lamk., ii. 376, No. 1. 



this species, to which Lamarck refers , Lamour., Exp. Meth. 53, tab. 63. 



them. , Deslongchamps, Encyc. 604. 



, Esper, i. 132, tab. 20; characteris- , Blaiuville, Man. 365. 



tic, with an enlarged view of the surface. Pavonia cristata, Ehrenb., G. Ixv., sp. 1. 



11. A. MYCEDIA CRISTATA. (Lamarck.} 



A. bifrons et erecta ; frondibus elongatis et profunde lobatis, lobis rotun- 

 datis, cristatis ; polypis subseriatis et scepe spar sis; collibus inter dum 

 transversis, scepius sinuosis et reticulatis, subacutis aut obtusis, cellas 

 2-2J'" latas includentibus. 



Bifacial and erect ; fronds long and deeply lobed, lobes rounded, cris- 

 tate; polyps subseriate and often scattered ; ridges sometimes trans- 

 verse, but generally sinuous and reticulate, subacute or obtuse, and 

 including cells 2 to 2 lines broad. 



West Indies. 



This species forms fronds, deeply lobed or even subpalmate, the 

 lobes being often one to one and a half inches wide, two to three 

 long, and one-fourth of an inch thick. The corallum has a very firm 

 stony texture, with the edge of the lobes subacute and often cristate. 

 The furrows of the surface are much meandering, and there are 

 many scattered isolated cells, and others with definite outline in the 

 furrows. This species appears to differ from the agaricites in its 

 wider and deeper trenches, and its narrower and longer lobes. 



/3. tenuifolia. Another specimen examined has the folia more than 

 one-half thinner, and somewhat crisped, with the polyps scarcely 

 seriate, except imperfectly so near the margin, the ridges low and 

 rounded, and often obsolescent, and the oririmes three-fourths of a line 

 wide, more coarsely stellate and scattered. It may be a different 

 species. Ellis's figure, referred to under the agaricites, has much 

 resemblance to it in its cells and surface. 



Pavonia cristata, Lamk. ii. 377, No. 2. Pavonia cristata, Blainv., Man., 365. 

 , Deslongchamps, Encyc., 604. 



