MUSEUM OF COMPARATIVE ZOOLOGY. 55 



Pavonia Danse Vekrill. 



Syn. Pavonia bold if or mis Dana (non Lamk.) ; Lophoseris Danai M. 

 Edw. and IIaimk. — Sooloo Sea; J. D. Dana. 



Pavonia varians Vekrill 



Corallum incrusting, varying in form according to the object upon which 

 it grow?, at times glomerate, massive, and gibbous, with short angular or 

 convoluted crests rising from the surface. These sometimes become more 

 elevated, with an acute edge, or, by incrusting the tubes of Serpulaj, rise 

 into irregular ramose forms. Septa from twelve to sixteen, the primary 

 ones thickened, strongly granulated. Cells rather small, open ; columella 

 small, papilliform, often wanting. — Sandwich Islands ; A. Garret. 



Leptoseris papyraoea Veruill. 



Syn. Paconia papyracea Dana. — Sooloo Sea; J. D. Dana. 



Mycedium fragile Dana; Agassiz MS., Florida Reefs, fig. — Florida; L. 

 Agassiz. 



Agaricia agaricites M. Edw. and Haime. 1S51. 



Syn. Madrepora agaricites Pallas, 17CG; Pavonia agaricites Lamk.; 

 Agaricia (Mgcedia) agaricites Dana. — Florida ; L. Agassiz. — Ilayti ; 

 D. F. Weinland. 



Agaricia purpurea LeSceur. — Ilayti ; D. F. "Weinland. 



Siderastrea radians Agassiz, MS. 1. c., fig. (unpublished). 



Syn. Madrepora radians Pallas, 176G ; Madrepora galaxea Ellis and 

 Sol. 178G ; Astrea galaxea Lamk. 1801 ; Siderastrea galaxea Bainv. 1830; 

 M. Edw. and II. 1850 ; Siderina galaxea Dana, 1846 ; Astrea radians M. 

 Edw. 18 37. — Florida; L. Agassiz. — Ilayti; D. F. Weinland. 



Professor Agassiz ascertained by an examination of the living polyps of 

 this species, in 1850, that it is a Fungian closely allied to Pavonia, with 

 which it also agrees in the structure of the coral ; the name Astrea, there- 

 fore, cannot with propriety be retained for the genus, although it was one 

 of the species originally included in that genus by Lamarck. 



Siderastrea siderea Blainville. 1830. 



Syn. Madrepora siderea Ellis and Sol. 1786; Astrea siderea Lamk. 

 181G; Pavonia siderea Dana, 1846. — Florida; L. Agassiz. — Ilayti : 

 D. F. Weinland. 



Siderastrea elavus Verrill. 



Syx. Pavonia elavus Dana, 1846; Lophoseris? elavus M. Edw. — 

 Feejee Islands ; J. D. Dana. 



Pachyseris fluctuosa Verrill. 



Corallum forming large explanate plates, which are rather thin, some- 

 what semicircular in outline, attached by the central part of the lower 



