118 
SUBORDER II. ALCYONARIA. 
I 
Genus IY.— PENNATULA.— Linn.^us. | 
Penniform or plume-sliape, pinnules on opposite sides, broad i 
and spreading, with the upper margin polypiferous ; axis osseous. 
1. Pennatula phosphorea. — Reddish-purple, basal portion terete, fleshy, 
and rather long ; back of the rachis crowdedly scabrous with papillte, and ||r 
sulcate down the middle; margin of the pinnules pectinate, with dentato-jj 
setaceous calicles. ]| 
European seas. 
2. Pennatula rubra {Liutkeus ). — Five inches in length, base terete; 
back of the rachis dilated, with a sulcus along the middle, and the sides gran- 
ulous; margin of the pinnules pectinated with dentato-setaceous calicles. 
Mediterranean Sea. 
3. Pennatula grisea {Gmelin). — Cinereous, 8 inches long; rachis fleshy, 
with the back smooth ; plume oblong-ovate ; pinnules quite broad, and when 
contracted long spinous. 
Mediterranean Sea. 
4. Pennatula argentea {Ellis). — Narrow lanceolate and very long (some- 
times a foot and a half) ; pinnules crowded imbricate, short and dentate, 
silvery in appearance. 
East Indies. 
Appendix. — Pennatula grandis (Ehrenherg). 
Subfamily II. — PAVONARIN^. 
Polyps not retractile. 
Genus Y.—PAYON APIA.— Cuvier. 
Yirgate Pennatulid^, Paving the polyps along one side of the 
stem, and not retractile. 
Pavonaria quadrangularis {Pallas,) Blainville . — Long (2 feet), and slen- 
der ; polyps crowded in three longitudinal series, arranged in quincunx order. 
Mediterranean Sea. 
