TRIBE I. ASTR^EACEA. 273 



Agaricia ampliata, Lamk. ii. 381, No. 4. , Blainville, Man. 361 : also Pavmiia 



, Lamour., Encyc., 13; A. flabtllina, ampliata, 365. 



Exp. Meth. 54, tab. 41, figs. 1, 2. Mi/cedium ampliatum, Oken, Zool., i. 70. 

 , Schweigger Handb. 415. Merulina ampliata, Ehrenb. G. Ixiv. sp. 1. 



2. MERULINA REGALIS. (Dana.) 



M. late explanata, unifrons, varie lobata et plicata, et in hemispheram 

 ampliter instructa, foliis 3-6" latis ; umbrina, discis virescentibus, 

 tentaculis, moraine seriatis, minutis. Corattum collibus angustis, fere 

 1'" altis ; lamellis laxis. 



Broad explanate, unifacial, variously lobed and plicate, and forming 

 a broad open hemispherical clump ; folia 3 to 6 inches broad ; 

 umber-coloured, disks greenish, tentacles minute, forming a series 

 along the margin of the disk. Corallum with the ridges narrow, 

 nearly 1 line high ; lamellae lax. 



Plate 15, fig. 1, outline sketch of part of the corallum, natural size; 

 1 a, part of the live zoophyte; 1 b, enlarged view, showing the ten- 

 tacles ; 1 c, view of the cells and the ridges enlarged ; 1 d, 1 e, la- 

 mellae enlarged. 



Feejee Islands. Exp. Exp. 



This species forms hemispherical clumps, sometimes four feet in 

 diameter, consisting of large subimbricate folia, which are often 

 coalescent. The ridges of the surface are more ragged than in the 

 ampliata, and less neatly rounded and even, or a little compressed 

 laterally. The under surface resembles that of the ampliata, but is 

 less coarsely granulous. 



3. MERULINA SPECIOSA. (Dana.) 



M. tenuissime explanata, unifrons ; foliis aggregatis, 1-3" latis, valde 

 crispis, confertim implicatis, scepe crenato-lobatis. Corallum collibus 

 %'" altis, inter dum obsoktis, lamellis subtilibus, confer tis. 



Very thin explanale, unifacial ; folia aggregated, and crowdedly im- 



69 



