34 VERRILL, SYNOPSIS OF 



In " box 820," with Montipora capitata, Porites lobata, 

 Coelastrea tennis, Favia rudis, PociUopora. (Coll. Smithso- 

 nian Institution). 



ASTREA (FAVIA) RUDIS Verrill, nov. 



Corallum massive, convex or hemispherical, cellular. 

 Corallites a little prominent, oval or oblong, unequal, rather 

 close together at the margin, crowded at the center, with 

 concave interstices striated by the thin, salient costae. Cells 

 deep, conical, with three cycles of septa, which are narrow, 

 thin within but strongly thickened near the walls, considera- 

 bly exsert. the upper part divided into strong spinose teeth, 

 the inner edges with more slender sharp ones; paliform 

 teeth little marked. Columella fine, spongy. 



Diameter of coral five inches; of largest cells .38; 

 depth about as much. 



Sandwich Islands ( ? ) Prof. J. D. Dana. 



ASTREA (FAVIA) ORDINATA Verrill, nov. 



Corallum evenly convex, or hemispherical, incrusting be- 

 low. Corallites projecting considerably above the surface, 

 scarcely crowded ; the interstices concave, evenly ribbed by 

 the prominent, denticulate costae. Cells large, open and 

 deep, subcircular or oval, pretty regular. Septa in three 

 complete cycles, with some members of the fourth, amount- 

 ing usually to from 30 to 36, all of them nearly equal and 

 remarkably even in their appearance, narrow within the 

 cells, with strong paliform lobes at the base, but broader 

 and regularly rounded at the top, appearing slightly revo- 

 lute, moderately thick, evenly serrate, with small teeth. 

 Columella little developed. 



Diameter of a small specimen 2.25 inches; thickness 

 at centre .75; length of cell .38; width .26; depth .24. 



Hong Kong, China. Dr. Wm. Stimpson. 



This species is closely allied to A. speciosa Dana, from 

 Singapore, but differs in several important particulars from 

 the original specimens of that species. 



