NATURAL SCIENCES OF PHILADELPHIA. 367 



Reptomulticava cepularis. 

 Alveolites cepularis (?) S. G. Morton, Cretaceous. 



Colony irregular, nodulated, with a tendency to an irregular pyramidal 

 outline. Cells elongated, hexagonal, large. 



This is probably the species named by Morton, but as no description or 

 figure was given, it cannot be certainly stated. 



Multicrescis parvicella. Colony large, anastomosing in the manner 

 of Rhipidigorgia flabellum. Cells small, resembling those of M. lanata 

 D' Orb. Cellules wanting. 



Note. Figures of the above species will be given in the next number of the Journal 

 of the Academy. 



On Milne-Edwards' Synonymy of Xiphigorgia setacea. 

 BY GEO. H. HORN. 



My attention was directed to the above, by finding the polypidom, called by 

 Dana ' ' Gorgonia (Pterogorgia) setacea," classed with the "X. setacea" 

 of M. -Edwards, who considers them synonymous. 



The"X. setacea" of Edwards is thus described : 



"Polypiero'ide en forme de rubans tres-etroits, flexueux et tres-longs, mais 

 sans vestige de ramifications. Coenenchyme jaune ; verrues caliciferes 

 arrondies, de couleur rose, et formant, de chaque cote, une bordure saillante. 



Hab. Mers d' Anterique. ' ' 



Pallas' original description is 



"Gorgonia, simplex, rigida, cortice calcareo albo subverrucosa. 



Locus. Mare Americanum." 



Dana subsequently amplified the above description, rendering it more ex- 

 plicit. 



" Gorgonia (Pterogorgia) setacea. Whitish, simple, rigid, rarely with a 

 single branch ; surface subverruculose ; verruculse minute (one-third of a 

 line), and obsolete, numerous and crowded, mostly on two opposite sides, 

 with a narrow, naked interval between. 



Laguayra. Z. Collins." 



The latter description was derived from a specimen in the Academy's 

 Museum, and does not resemble either the description or figure of Milne- 

 Edwards. 



The " X. s et a c e a," as described and figured by Milne-Edwards, agrees in 

 every important respect with the " Gorgonia j uncea" of Pallas and subse- 

 quent authors. 



''G. simplicissima, attenuata, subflexuoso, cortice crasso, rubro verrucoso." 

 PaLlas, 1766. 



" G. simplicissima, teres, utrinque, attenuata, osse corneo fusco, carne 

 ochracea bisulcata, osculis crebris linearibus uotata. " Ellis, 1786. 



"G. simplicissima, longissima, teres ; carne ochracea subminiata ; osculis, 

 crebris sparsis subgranulatis." Lamarck, 1816. 



From the above descriptions, we conclude, that the species described 

 by Milne-Edwards as "setacea," is none other than the " j u nc ea" of 

 older authors. 



Pterogorgia simplex described by Valenciennes, in Comptes Rendus, 

 xli. (pp. 10, et 13), differs from either the " s e tacea" or "j uncea" in 

 the form of its " verrues caliciferes." 



The true disposition of these polypidoms appears to be as follows : 

 I860.] 



