SUBORDER II. ALCYONARIA. 
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compressed ; polyps scarcely prominent, mostly marginal, but not generally 
in regular series. 
Atlantic and coast of Africa. — Lamarck, 
9. G. Pterogorgia va’tvl.x {Ellis^) Dana. — Deep red ; eiglit inches high ; 
ramose, subpinnate, tortuous ; branches compressed, not crowded ; polyps sub- 
distichoiis ; axis fuscous. 
Mediterranean Sea. 
10. G. Pterogorgia setosa {Linn.). — Purple; very large, often five feet 
high ; ramose and very densely ramulous ; pinnules nearly opposite or some- 
what scattered, subterete, very long filiform (two to six inches in length), and 
hardly one line thick, longitudinally faint sulcate along the middle, becoming 
pendulous when adult, not verrucose ; polyps subseriate, the opposite series 
often double ; axis black. 
Fig. 32, page 72, extremity of a branch. — West Indies, where it is com- 
mon. — ’Var. sei'icea, West Indies. — Dost. Soc. JVat. Hist. 
11. G. Pterogorgia turgida {Ehrenberg). — Yellow, with the habit of 
the acerosa; eight inches high, and seven broad; pinnules turgid, narrower 
and shorter (two inches long), with a double series of pores on the sides fur- 
nished with red papillae. 
St. Thomas, West Indies. — Ehrenherg. 
12. G. Pterogorgia violacea. — Violaceous; ramose in a plane, pinnate ; 
polyps arranged for the most part in four series, and the branches therefore 
quadrangular ; verrucae nearly obsolete, contiguous. 
American Seas. 
13. G. Pterogorgia laxa {Lamarck). — Lax ramose, flabellate; branches 
somewhat depressed, smooth; branchlets crowded, a little curving; polyps 
submarginal. 
14. G. Pterogorgia rosea. — Rose-red ; dichotomously branched, in a 
plane; branches subpinnate; branchlets terete, unequally ascending; polyps 
subseriate. 
Mediterranean, and Atlantic Ocean. — Lamarck. 
15. G. Pterogorgia fusco-pdrpurea {Ehrenherg,) Dana. — Dark brownish- 
purple, dichotomously branched, flabellate; branchlets parallel, compressed, 
the summit branchlets nearly terete (three-fourths of a line thick), flexuous at 
base, long before branching, and virgate ; polyps forming two lateral bands. 
16. G. Pterogorgia sulcifera. — Reddish-yellow; very tall, and branch- 
ing in a plane; branchlets mostly second, ascending, obsoletely verrucose, 
every where with a medial sulcus ; cortex thin. 
Indian Ocean. 
