412 



ZOOPHYTES. 



Explanate; frond stipitate, broad, hypocrateriform, often plicato-con- 

 torted, thin (margin but a line thick). Corallum wrinkled with- 

 out; within calicles short, a line in diameter, conical or globoso- 

 conical, cells of a line broad and deep. 



Plate 30, fig. 11, surface of corallum magnified. 



East Indies, Singapore. Exp. Exp. 



The cinerascens in its very thin frond, approaches the following 

 species, but grows from a central pedicel. The under surface is 

 wrinkled for an inch or two from the margin. Under the microscope 

 the surface of the corallum presents minute, irregular, distant gra- 

 nules, and pores still more distant, as shown in the figure. It grows 

 to a height of a foot or more. The surface, when weathered, has 

 usually a light bluish-ash colour. 



Mad. cinerascens, Ellis and Sol., 157, tab. 



43 ; a characteristic figure. 



, Esper, Fortsetz., i. 84, tab. 68. 



Explanaria mesenterina, Lamk., ii., 399, 



No. 2 ; more than one species may be 



here included. 



, Lamouroux, Exp. Meth., 57, pi. 43. 



Tarbinaria cinerascens, Oken, Zool., i. 67. 

 Explanaria cinerascens, Schweig., Handb., 



419. 

 Gemmipora mesenterina, Blainv., Man., 



387. 

 The Turbinaria microstoma, of Ehrenberg, 



Gen. xlix., sp. 3 ; appears to be identical 

 with the cinerascens of Ellis, of which 

 it may be a small specimen. His de- 

 scription is as follows : " Quadripollica- 

 ris, cinerascens, cyathiformis, stellulis 

 (caliculis) apice angustioribus, subconicis, 

 i'" latis, intcrstitiis glabris, parcius exe- 

 sis." The locality is not given. The 

 Explanaria cinerascens of Ehrenberg 

 (op. cit. Gen. 1. sp. 2) is another species, 

 as indicated by its mode of growth, and 

 the character of its surface; it may be the 

 G. brassica. 



3. G.foliacece,frondU>us aggregatis. 



6. GEMMIPORA FRONDENS. (Dana.} 



G. explanata; frondibus aggregatis, suberectis, sinuatis, margine '" 

 tenuibus, inter dum lobatis; polypis flams. Corallum extus non ru- 

 gatum, intus caliculis confertis, brevibus, subcylindricis et globoso-coni- 

 cis, cellis profundis, apertura -'" ^"- 



Explanate; fronds clustered, suberect, sinuate, margin of a line 

 thick, sometimes lobed ; polyps yellow. Corallum not wrinkled 



