244 ZOOPHYTES. 



48. ASTR^EA. MELICERUM. (Ehrenberg.} 



A. effusa, 3'" alta, pentagon* affinis. Corallum cellis 2'" latis, colu- 

 melM nulla, interstitiis paulo latioribus, subtruncatis. 



Effuse, 3 lines high, allied to the pent agona. Corallum with the cells 

 2 lines broad, columella none, interstices a little broader, sub- 

 truncate. 



This species forms an incrustation attached to a strombus ; the 

 locality is unknown. 



Astraa melicerum, Ehrenberg, G. lx., sp. 6. 



49 . ASTRJEA PARVISTELLA. (Dana.) 



A. convexa. Corallum cellulosum ; cellis angulatis, 1'" latis, raro oblongis, 

 paulo profundis, intus conspicue coronatis ; collibus vix %'" crassis, 

 rotundatis ; lamellis minutis, cequalibus : transverse secto, stellis vix 

 multiradiatis, cum cellulis simplicibus; septis subsolidis, vixfy" crassis: 

 textura sub cellis aperte cellulosd. 



Convex. Corallum cellular ; cells angular, a line broad, rarely ob- 

 long, shallow, distinctly coronate within ; ridges scarcely a line 

 thick, rounded ; lamellae minute, even : in a transverse section, 

 stars scarcely many-rayed, with the cellules simple ; septa nearly 

 solid, scarcely J of a line thick : texture below the cells coarsely 

 cellular. 



Plate 13, fig. 6, cells of corallum, natural size; 6 a, transverse sec- 

 tion of corallum, enlarged ; 6 b, same, natural size ; 6 c, vertical section, 

 natural size. 



Feejee Islands. Exp. Exp. 



This species is singular, considering the small size of the polyps, in 

 having the internal texture below the cells quite coarsely cellular. The 

 corona of minute teeth nearly fills the cells. It is a rather heavy coral. 

 In habit it resembles the favistella, though much smaller in its cells 

 and ridges. 



