342 ZOOPHYTES. 



brevibus, 1-3'" latis, et grandioribus fundo scepe reticulatis. Corallum 

 robustum, subtus subtilissime striatum. 



Coarse gibboso-glomerate and angular, below broad planulate, spa- 

 ringly undulate, and stipitate at centre; polyps often reticulately 

 subseriate, but generally scattered ; surface reticulate with ridges 

 which are triangular and nearly acute ; fossae short, 1 to 3 lines 

 broad, and the larger often reticulate at bottom. Corallum below 

 very finely striate. 



Barbadoes, West Indies. 



The specimen affording the above description, has a nearly flat 

 under surface, measuring seven inches by four in breadth, a little con- 

 vex and undulate, and finely striate like the unifacial species. But 

 above at middle it rises into a glomerate gibbous column, four inches 

 high and one to three broad, with angular prominences, and the whole 

 surface unevenly reticulate, the larger ridges often enclosing small 

 polygonal or oblong areas, which are reticulate within with other 

 smaller ridges. The lamellae are alternately larger, and nearly entire ; 

 and under the microscope are very thin. 



III. Foliacece, bifrontes. 



10. A. MYCEDTA AGARICITES. 



A. bifrons et erecta, frondibus scepe aggregatis, crassis, semi-rotundis, 

 polypis transverse seriatis ; collibus transversis, subacutis, scepe flex- 

 uosis; fossis l"' latis et 1'" profundis. Corallum robustum. 



Bifacial and erect, fronds often aggregated, stout, semicircular in out- 

 line ; polyps transversely seriate ; ridges transverse, subacute, often 

 flexuous, fossa? l lines broad and 1 deep. Corallum firm and 

 compact. 



West Indies. 



A stout, very compact, hard coral, growing in sparse clusters of 

 sparingly lobed fronds, rounded in outline, with a nearly acute edge, 

 and a neatly rugate or ridged surface. The furrows are longer and 

 more even than in the cristata, and not so broad. 



