SUBORDER ALCYONARIA. 623 



is thick and stout. The general colour is slate, with the summits 

 dull grayish-yellow. 



II. Ah-.yonia explanala, svperjicie pla,na. 



18. ALCYONIUM GLAUCUM. (Quoy $ Gaymard.) 



A. molk, stipitatum, late explanatum, margine valde undulatum, revolu- 

 tum, et scepe lobatum; polypisfere I'" remotis, fuscis ; tentaculis apice 

 luteo-virentibus. 



Soft, stipitate, broad explanate, margin much undulate, revolute, and 

 often lobed ; polyps mostly a line distant, fuscous, tentacles at apex 

 light yellowish-green. 



Plate 58, figures 4, 5, and plate 59, fig. 6, unexpanded, natural size. 



Tongatabu. Quoy $ Gaymard. Tongatabu and Feejees. Exp. 

 Exp. 



This zoophyte forms very broad plates, spreading from a stout 

 pedicel. The figures are supposed to represent varieties of the same 

 species; fig. 4 is dull brown, and the others bright copper-green. 



Akyonum glaucum, Quoy & Gaymard, Voy. de I'Ast., iv. 270, pi. 22, figs. 1 1 and 12. 



19. ALCYONIUM LATUM. (Dana.) 



A. subrigidum, crassime stipitatum et latissime explanatum, margine 

 ampliter sinuose undulatum, vix revolutum ; polypisfere 1'" remotis, 

 punctis uni-seriatis circumscriptis. 



Rather rigid, very stout stipitate and very broad explanate, margin 

 u sinuously undulate, scarcely revolute; polyps about a line distant, 

 and surrounded by a series of points. 



Plate 58, figure 6 a, surface, magnified ; 6 b, one of the polyps, mag- 

 nified ; 6 b', same, natural size. 



Feejee Islands. Exp. Exp. 



This explanate species covers areas several feet square, and has a 



