SUBORDER ALCYONARIA. 653 



19. G. PTEROGORGIA LKUCOSTOMA. (Ehrenberg.} Dana. Rose-red, 

 with a whitish margin; a foot high and nine inches broad; densely 

 rarnulons, subflabellate, not coalescing, rigid; branches flexuous, nearly 

 terete, half a line thick, margin polypiferous. 



Gorgonia Icucoslom z, Ehrenb., G. Ixxxlv., sp. 3. 

 B. Not pinnate, nor ramose in a plane. 



20. G. PTEROGORGIA SARMENTOSA. (Esper.) Pale yellowish ; large ; 

 lax paniculate, branchlets slender (half a line), and flexuous, nearly 

 terete, often sulcate ; polyps lateral, often in a single series, margin of 

 branchlets uneven, with obsolescent verruca? ; cortex thin. 



Mediterranean. Esper. 



Gorgonia sarmentosa, Esper, ii. 85, tab. , Lamour., Pol. flex., 415 ; Encyc., 



21. and Fortsetz., 165, tab. 45; charac- 445. 



teristic figures. , Blainville, Man., 500. 



, Lamk., ii. 498, No. 32. 



21. G. PTEROGORGIA SETACEA. (Pallas.} Whitish ; simple, rigid, 

 rarely with a single branch; surface subverruculose, verruculre minute 

 (one-third of a line) and obsolete, numerous and crowded, mostly on 

 two opposite sides, with a narrow naked interval between. 



The American Seas. Pallas. Laguayra, S. A. Z. Collins. 



A specimen of this species in the collections of the Academy of 

 Natural Sciences, at Philadelphia, deposited by Z. Collins, is a simple 

 rigid terete stem, not over two lines thick, four and a half feet long, 

 with the axis pale brownish, the cortex thin, white and very persistent, 

 and the minute verrucas scarcely at all prominent ; the narrow naked 

 line is distinct. The polyps are in general hardly half a line apart. 



Go/'gonia sctacea, Pallas, Zooph., 182. Gorgonia sctaceu, Lamarck, 2d ed., ii. 502, 

 , Lamouroux, Polyp, flex., 421 ; En- No. 35 n. 



eye., 447. 



NOTE. The Gorgonia sanguinolenta of Esper (tab. 22) is a closely branched species, 

 resembling in its habit, the stoutness of its branches, and thickness of cortex, the Gorgonia 

 ardijmtlics, the branchlets being over one and a half lines thick near their summits. It is 

 represented of a yellow colour, with two or more series of polyps on opposite sides of the 

 branches, and is said to come from the American seas. 



The Gorgonia ceratophj/t.a of Ellis nnd Solandcr, tab. 12, is nearly as stout, with a 

 somewhat similar habit, and a deep medial longitudinal furrow separating the polyps of 

 the two sides. It was from the West Indies. The branches are full twice the diameter 

 of the ceratophyta of Pallas. 



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