220 



ZOOPHYTES. 



Ellis's figure is very good, but gives quite 

 a different one himself. 

 Astrcea astroites, Ehrenberg, G. Ix. sp. 1. 

 Ehrenberg's specimen was from the An- 

 tillas; he describes it as follows, referring 

 to Ellis's figure, with a query: "incrus- 



tans, effusa, parum pulvinata, 4-6'" alta, 

 stellis contiguis, planis, radiatis, intcqua- 

 libus, 5-6-gonis, sesquilinearibus, inter- 

 stitiis nullis." It is probably a different 

 species ; especially as he states that it 

 increases by spontaneous fission. 



SUBGENUS III. FISSICELLA. 



A. SlTBGLOBOSA, AUT CONVEXA. 



a. Stellarum cellulis, corallo transverse secto, decompositis ; (lamellis regularibus.) 

 I. Caliculis prominulis. 



18. A. SPECIOSA. (Dana.} 



A. hemispherica ; polypis prominulis, 4-6'" latis. Corallum percellulo- 

 sum ; caliculis scepius subcylindricis et 1 1 J'" prominulis, scepe paulum 

 remotis, margine bene rotundatis ; cellis profundis, et abrupte dedivis, 

 intus vix coranatis ; lamellis bene regularibus et denticulatis : trans- 

 verse secto, stellis tenuissime multiradiatis ; cellulis decompositis, septis 

 percellulosis. 



Hemispherical ; polyps a little prominent, 4 to 6 lines broad. Coral- 

 lum light cellular; calicles usually subcylindrical, and 1 to 1J 

 lines prominent, often somewhat remote, margin neatly rounded ; 

 cells deep, abrupt within, and scarcely at all coronate ; lamellse 

 neatly even and denticulate : in a transverse section, stars many- 

 rayed ; rays very thin and cellules decompound ; septa very cellular. 



Plate 11, fig. 1, part of the corallum, natural size; 1 a, vertical sec- 

 tion of cell, and profile of lamellae ; 1 b, lamellse enlarged ; 1 c, trans- 

 verse section of corallum, natural size ; 1 d, vertical section, natural 

 size. 



East Indies. Exp. Exp. 



