TRIBE I. ASTR^EACEA. 257 



in the West Indies, the mouth has six vertical folds on each side, 

 encircled with red and yellow mingled with green. The tentacles 

 are long, red, with small white spots, and are eighteen to twenty in 

 number to each polyp; the ridges between the disks are brownish-red. 



Lapis corallites globosus, &c., Scba, Thcs. Mceandra labyrinthiformis, Oken, Zool. 



iii. tab. 112, fig. 7; a figure of a worn i. 70. 



specimen. M. Platygyra labyrinthica, Ehrenb., G. 



Mad. labyrinthica, Ellis and Solander, 160, Ixii. sp. 1. Ehrenberg's specimens were 



tab. 46, fig. 3 ; a good figure. from the Red Sea. He refers to Savigny's 



Madrepora mceandrites, Esper, i. tab. 4 A. figure 4, tab. 5 (Desc. de 1'Egypte), as a 



Meandrina labyrinthica, Lamk. ii. 386, representation of the species ; and if 



No. 1. the figure is correct, it may be dis- 

 , Lamour., Exp. Meth. 54, tab. 46, fig. tinct from the true labyrinthica of the 



3 ; Encyc. 507. West Indies : the gyri are rather nar- 

 , Lesueur, Jour. Acad. Nat. Sci. of rower, and the ridges less prominent. 



Philad., i. 180, pi. 8, fig. 11 ; figure and The animals according to Ehrenberg 



description of the polyps. have a bright green disk, with the ridges 

 , Blainv., Man. 357, pi. 56, fig. 4 ; fuscous. This author also states that 



the figure is reduced, and imperfect. they have no tentacles. 



4. MEANDRINA STRIGOSA. (Dana.} 



M. hemispherica : discis linearibus prcelongis, gyrosis ; gyris bene regu- 

 laribus, 2"' latis. Corallum cellulosum, subrobustum ; fossis fundo 

 porosis : transverse secto, septis Jiliformibus, viz $'" crassis, lamellis 

 cequattbus, tenuissimis, numerosis. 



Hemispherical ; linear disks very long, gyrose ; gyri evenly 2J lines 

 broad. Corallum cellular and rather light ; bottom of trench con- 

 voluto-porous : in a transverse section, septa filiform, hardly J of a 

 line thick ; lamellae equal, very thin, numerous. 



Plate 14, figure 4 a, transverse section of corallum, natural size; 4 

 b, vertical section of same. 



West Indies ? 



Only a worn specimen of this species has been seen by the author. 

 This was part of a large hemisphere, probably several feet in diameter. 

 The septa were not at all prominent, having been worn down even with 

 the intermediate cell. The thin septa, less than a third of a line thick, 



65 



