Verrill, ^^otes on Jiddlata. 497 



The briinchiform orij^ans are dark greenisli, broad, sliort, strongly 

 arched. 



Panama, — LcConte; Pearl Islands, — F. II. Bradley. 



Mammillifera nitida Vcniii. 



Polyps close together on a broad basal membrane, rather tall, sub- 

 cylindrical, with a smooth soft surface; height, of pro^erved specimens, 

 •30 to -40; diameter -12 to '15 of an inch. Tentacles, in the specimen 

 dissected, 54, rather long, slender, pointed. Color, in alcohol, dark 

 greenish. 



Acajutla, San Salvador, — F. II. Bradley. 



The slenderness and length of the tentacles will distinguish this 

 species from the {)receding. 



Mammillifera conferta Ven-iii, sp. nov. 



Polyps so closely crowded u])on the basal membrane that they are 

 usually in contact and pressed into polygonal forms. Column in con- 

 traction, low, I'oiuided, mammilliform, about as broad as higli. Sur- 

 face smooth, showing the internal lamella^ through the walls. Tenta- 

 cles, in the specimens dissected, aI)0Ut 54, very short, like small, rounded 

 papilhe, arranged in two regular series. Color, in alcohol, nearly 

 white. Height, in contraction, "OS to '12 ; diameter "10 to '12 of an 

 inch. 



San Salvador, — Capt. J. M. Dow ; Acapulco, — A. Agassiz. 



This species covers the surface of shells, etc., with its crowded 

 polyps, which are usually so close together as to entirely conceal the 

 basal membrane. 



EpizOanthllS Gray (sens. mod.). (Gemmaria, 1st Ed.). 

 Gemmaria Duch. and M., Corall. des Antilles, p. 55, 1860 {non McCrady). 

 Palythoa (pars) Edw. and H., Corall., i, p. 30], 1857. 

 Epizoauthus and Gemmaria Gr ly, Proc. Zool. Soc. London, ISCT, p. 237. 



Polyps arising from a broad, thin, basal membrane, sometimes cov- 

 ering dead shells occupied by hermit-crabs. Column more or less ele- 

 vated ; surface indurated by a layer of firmly adhei-ent grains of sand. 



Epizoanthus elongatUS Verrill. (Gemmaria' elongata. 1st Ed.). 



Basal membrane thin, encrusting rocks. Polyps very une(|ual in 

 size and height, mostly elongated, not crowded, separated usually by 

 distances less than the diameter of base. Column tall, sub-cylindrical, 

 often constricted somewhat at base, transversely wrinkled, the surface 

 covered throughout by a nearly uniform layer of small grains of sand. 

 Tentacles, in specimens dissected, numerous, about 46, in two rows, 



