526 Verrill, Notes on Radiata. 



in the typical species, and blending gradually with the papillfe of the 

 columella. Transverse dissepiments few and distant. Walls naked 

 and costate toward the summit, often covered toward the base mth 

 an imperfect epitheca and various encrustations. The polyps in ex- 

 pansion are sub-j^ellucid, and rise considerably above the calicles ; the 

 tentacles are long, slender, and covered with small white verrucse, 

 with a knob at the end. 



This genus is widely distributed, but appears to be most abundant 

 on tlie American coasts, where its numerous species range on the 

 Atlantic side from Cape Cod to Patagonia and on the Pacific side 

 from the Gulf of California to Peru, and perhaps farther. Three 

 species, at least, are found in the West Indies ; two on the Atlantic 

 coast of the United States ; one or more at Rio Janeiro ; and one in 

 the Straits of Magellan. One large species is found on the Atlantic 

 coasts of Spain and Portugal ; and one on the British coast. From 

 the Indo-Pacific fauna none have been described except A. palifera, 

 though others probably exist there. Two or more species are also 

 found in the tertiary strata along the Atlantic coast of the United 

 States.* Two species : A. Edwardsii Verrill {Jl. Dance E. and H.) 

 and A. Michelini E. and H., are from unknown localities, but may be 

 identical with some of the species already referred to from the 

 Atlantic coast of South America. 



Astrangia Haimei Verriu. 



Astrangia Haimei Yerrill, Proc. Boston Soc. N^atural History, x, p. 330, April, 1866. 

 Plate IX, figures 6, 6^ 



Coralla encrusting, consisting of prominent cylindrical or turbinate 

 corallites, sometimes rising more than half an inch above the surface of 

 the basal expansion, which connects them together, and becoming 

 slightly turbinate and divergent when highest. 



The corallites are distant from each other from '04 to '25 of an inch. 

 The basal mural expansion is very thin, compact, and slightly gran- 

 ulated, having a smooth appearance, and usually without apparent 

 striations. Septa from thirty to forty-eight, very narrow and thin, 

 with the inner edges nearly perpendicular, forming a deep cup, nar- 

 row at the bottom ; they are all, except those of the last cycle, which 



center, according to their age, thus forming an irregular circle. "Wall compact, glossy, 

 with slight, nearly equal, finely granulated costi«. 



Height of corallites -06 to '10 of an inch; diameter -10 to -13; distance between 

 them -15 to -30. 



Ceylon, adhering to dead corals. — Museum of Yale College. 



* Both of these fossil species belong to the subgenus, Ocenangia, — see page 530. 



