Verrm.] 332 



■with the cokimella. The tops of the septa are thin, and project 

 slightly above" the wall, the primaries most so. Their sides are not so 

 strongly granulated as in the preceding species, and they appear 

 thinner, and less crowded. Exterior granulated, and slightly costate 

 near the summit, often encrusted with Bryozoa, etc., to near the top. 

 Diameter of cups .15 to .18 of an inch; height .10 to .15. 



Panama, not common. F. H. Bradley. Resembles the last, but has 

 much larger cells, and more numerous septa. 



Astrangia dentata sp. nov. 



Corallum forming clusters, encrusting rocks, resembling the last, 

 with cups of about the same size and height, but these are deeper 

 and less open. Septa from thirty-six to forty-eight, very unequal ac- 

 cording to their cycles, the primaries being comparatively broad and 

 rounded above, while those of the last cycles are very narrow and 

 rudimentary. All the septa are strongly and irregularly toothed, the 

 principal ones especially so, the teeth on the upper part being largest. 

 Columella much reduced, formed by a few papillae. Septa unequally 

 projecting, according to the cycles, the primaries about .02 of an inch. 

 Walls thin, with subequal, low, but thick costas, which extend often 

 on the surface of the basal expansion, which is often encrusted nearly 

 to the summit of the cups with sponge, etc. 



Panama, rare. F. H. Bradley. 



Astrangia costata sp. nov. 



Corallum consisting of from one to four turbinate, rather high cor- 

 allites surrounded by a very thin mural expansion, encrusting usually 

 dead shells. Cup circular, narrow and deep. Septa twenty-four to 

 thirty, the primaries wide, about one fourth the diameter of cup, 

 rounded and subentire at the top, perpendicular and toothed within ; 

 the others similar, but successively narrow, with sharp teeth through- 

 out. The septa project very unequally, giving a notched appearance 

 to the margin of the cells. Walls very thin, with subequal, elevated 

 costae, which extend to the base, and on the basal expansion. The 

 columella is very small, of few papillae. The septa within the cell are 

 thin, and not crowded, the spaces between them being greater than 

 their thickness, giving them a loose appearance. Diameter of the 

 cups .08 to .1 of an inch; height .10 to .15 inch. 



Panama, common. F. H. Bradley. Yery distinct from all the 

 others, and approaches Phyllangia. 



Phyllangia dispersa Verrill, 1. c. p. 47. 

 Panama, not common. F. H. Bradley. 



