eUBOnDER II. ALCYONARIA. 
121 
1. Xenia umbellata (Savigny). — Polyps bluish-glaucous, tentacles long„ 
papillae long, in three series; base 4 inches thick. 
Red Sea. — Savigmj, Ehrenherg. 
2. Xenia fuscescens {H. Ehrenherg). — Polyps biwnish, papillss in 4 
series on each side of the tentacles. 
Red Sea. — Ehrenherg. 
8. Xenia ciERULEA [H. Sf Ehrenherg). — Small and more delicate than the 
preceding, blue; papilla of the tentacles fev/er; trunk shorter, an inch thick 
at base. 
Red Sea. — Ehrenherg. 
4. Xenia Florida {Lesson,) Dana. — Pale bluish glaucous, lobed ; polyps 
f of an inch broad, | an inch prominent when fully expanded ; tentacles lan- 
ceolate; papillae very short, but little longer than broad, in 3 series, 
Plate 57, fig. 4, clump of polyps, natural size ; 4cr, upper view of tentacles ; 
46, under view of the sam.e. — Feejee Islands. — Exp. Exp. 
5. Xenia elongata {Dana). — Lobate, brownish; polyp-stars 8 to 9 lines 
broad, 1 to 1| inches salient; tentacles narrow oblong; limb pale, the inter- 
val above between the papilla; a little narrower than the fringe; papillfs deep 
brown, in 3 to 4 series, crowded, slender and elongate, 20 to 24 in the outer 
series. 
Plate 57, fig. 5, group, natural size ; 5 a, under view of tentacles, enlarged ; 
5 6, upper view of the same. 
Subfamily II.— ALCYONIN^. 
Carnose ; polyps retractile ; surface of contracted zoophytes 
either smooth or verrucose. 
Gexus IY.— AMMOTHEA.— Savigny. 
Carnose Alcyonidas, ramulous or fruticulose ; polyps retract- 
ing, witE verrucse not armed with spicula. 
1. Ammothea virescens {Savigny). — Greenish, spreading, finely and lax 
ramulous, soft, tentacles yellowish. 
Red Sea. — Savigny, Ehrenherg. 
2. Ammothea thyrsoides {H. Ehrenherg). — Spreading, branches cyl- 
indrical, an inch long, erect, simply carnose, verrucose. 
Red Sea. — Ehrenherg. 
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