SUBORDER II. — ALCTONARIA. 
123 
5. A. spherophora. 
6. A. pauciflorum. 
7. A. polydactylum. 
8. A. brachycladum^ 
9. A. aurantiacum. 
10. A. viride. 
12, A. flexile. 
13. A. flavum. 
14. A. trichantliinum. 
15. A. confertum. 
16. A. rigidum. 
17. A. morale. 
11. A. flabellum. 
n. Explanate, surface fat. 
18. A. glancum. 
19, A. latum. 
III. Glomerate and not lohulose. 
20. A. pulmo. 
IV. Ramose, surface of the pedicel becoming nearly solid from calcareous se^ 
cretions, and zoophyte retractile into the same. 
21. A, elegans. 
1. Alcyonium digitatdm {Linn.). — Mammillary or digitate, from an in= 
crusting base ; lobes few, cylindrical or conoid, often i to 1 inch thick, and 
several inches long: exterior subcoriaceous, grayish and orange, scattered 
over with stellate pores ; polyps, when expanded, 4 to 5 lines exsort, and sum- 
mit li lines in breadth. 
Coast of Britain and Northern Europe. 
2. Alctonium cydonium (Muller). — Glomerate, often conoid, not divided 
or lobate; exterior coriaceous and harsh; internal calcareous spicula very 
numerous, and often those at the surface tricuspidate. 
Island of Fulah and Norst. — Jameson. 
3. Alcyonium palmatdm (Pallas). — Erect, stipitate, above irregularly 
ramoso-palmate ; branchlets terete or subcompressed, unequal, to 2 lines 
thick, few; polyps 1|- lines exsert, expanded star about a line in diameter. 
Mediterranean Sea. 
4. Alcyonium stellatum (Milne Edwards). — Rose-red, short ramose or 
lobato-subdivided ; branches 3 to 4 lines thick and rounded; polyps scattered, 
the expanded star of tentacles nearly a line and a half in diameter; smface 
a little rough. 
Island of Chaussey. — Milne Edwards. 
5. Alcyonium spherophora (H. Sf Ehrenherg,) Dana. — Effuse, subhemi- 
spherical, membrane of the margin sterile, surface cerebriform, very short 
lobed ; lobes 2 to 3 lines broad, semiglobose, subdividing ; pale, polyps fuscous. 
Red Sea. — Ehrenherg. 
