336 



ZOOPHYTES. 



1. AGARICIA UNDATA. (Ellis.) Lamarck. 



A. latissime explanata, et scepe plano-subcucullata, vix lobata ; margine 

 tenui et non revoluto ; collibus ehngatis, et subcequalibus, maximis, 

 scepius J" latis, rotundato-triangulatis, ad extremum obsoletis. 



Very broad explanate, and often plano-subcucullate, scarcely lobed, 

 margin thin and not revolute; ridges long and rather even, mostly 

 of an inch broad, rotundato-triangular, becoming obsolete at the 

 margin. 



Plate 21, fig. 8, surface of corallum, natural size. 



West Indies. 



A specimen of this species from Key West, in the American Mu- 

 seum, New York city, measures eighteen inches by twelve ; it is 

 flat cucullate, and nearly reniform in shape, with an undulate surface, 

 and a thin subsinuous margin. The ridges are concentric with the 

 margin, and occasionally interrupted. The largest are about one- 

 fourth of an inch high, with an obtuse angle at top. Those near the 

 margin are very small and irregular. The oririmes are distinct in the 

 furrows, and about a line long. Another specimen, in the collections 

 of the Academy of Natural Sciences, at Philadelphia, measures fifteen 

 inches by eight. 



Mad. undala, Ellis and Sol., 157, tab. 40 ; Agaricia undata, Lamour., Exp. Meth. 54, 



a poor figure of part of a frond. pi. 40. 

 , Esper, Fortsetz. i. 98, tab. 78 ; from , Blainv., Man. 361 ; also Pavonia 



Ellis. undata, ibid., 365. 



Agaricia undata, Lamk., ii. 381, No. 2. Undaria undata, Oken, Zool. i. 69. 



2. AGARICIA RUGOSA. (Lamarck.) 



A. late explanata, crassa, parce inciso-lobata et interdum amplissime 

 subpalmata ; margine crasso, valde reflexo ; collibus grandibus, scepe 

 interruptis et valde incequalibus, basi 23'" crassis, apicibus scepe pro- 

 ductis : polypis subrubidis, tentaculis obsoletis. 



Broad explanate, stout, sparingly inciso-lobate, and sometimes wide 



