262 ZOOPHYTES. 



10. MEANDRINA TENTHS. (Dana.) 



M. subhemispherica ; discis linearibus tortuosis, virentibus, tentaculis 

 parvulis, brunnescentibus ; gyris l"' latis. Corallum percellulosum ; 

 cottibus Gothicis, abruptis, 1'" altis ; fossis angustissimis, fundo 

 lamdlo-lineatis et non porosis ; lamellis numerosis, cequalibus, sub- 

 tiliter denticulatis : transverse secto, septis vix J'" latis, seriatim 

 cellulosis. 



Subhemispherical ; linear disks tortuous, of a green colour ; tentacles 

 small, brownish; gyri l lines broad. Corallum very cellular, 

 rather light ; ridges Gothic, abrupt, a line high ; fossae very narrow, 

 lamello-lineate at bottom instead of porous; lamellae numerous, even, 

 finely denticulate : in a transverse section, septa hardly of a line 

 thick, seriately cellular. 



Plate 12, figure 7, enlarged view of part of the zoophyte ; 7 a, one 

 of the tentacles enlarged ; 7 b, section of cells showing profile of la- 

 mellae, natural size ; 7 c, lamella of same, enlarged ; 7 d, transverse 

 section of corallum, natural size. 



Feejee Islands. Exp. Exp. Tongatabu. Quay 4- Gaymard. 



This species differs from the gracilis, which it most resembles, in its 

 narrower and more sinuous gyri, and very thin cellular septa. The 

 lamellae also are not quite as close ; there being about twenty to a half 

 inch. 



Meandrina cerebriformis, Quoy and Gay- 2, 3 ; the disk is represented of a slate- 

 mard, Voy. de PAst. iv. 234, pi. 18, figs. blue tint. 



11. MEANDRINA FILOGRANA. (Esper.) Dana. 



M. convexa vel planiuscula ; discis linearibus subtortuosis ; gyris 1J'" 

 latis. Corallum cottibus rotundato-triangulatis, fere 1'" altis ; lamel- 

 lis subtilissime denticulatis, confertissimis ; fossis repandis, fundo con- 

 voluto-porosis. 



Convex or nearly flat; linear disks subtortuous; gyri l lines broad. 

 Corallum with the ridges rounded, triangular, nearly a line high ; 



