TRIBE I. ASTR^ACEA. 
11 
Plate 4, fig. 36, animal natural size ; a, upper view of the same. — False 
Bay, Porto Praya, Cape de Verdes. — Exp. Exp. 
II. Outer tentacles much the smallest. 
Actinia rhodora (Couthouy). — Subhemispherical, li inches thick, exte- 
rior smooth, base dilated and sparingly lobed ; tentacles subulate, rather stout, 
in 3 series, the internal 1 inch long, the external a third of an inch; mouth 
very turgidly prominent, 6-cleft within. 
Plate 4, fig. 37, expanded animal, natural size ; a, upper view of the disk 
and tentacles. — Hospital Island, Rio de Janeiro. — Exp. Exp. 
III. Inner tentacles much the smallest. 
Actinia artemisia {Pickering). — Suburceolate, at middle very turgid and 
inches through, disk somewhat dilated ; sides studded with vertical series 
of prominent tubercles, which become obsolete below ; tentacles in 3 series, 
stout, subulate, the inner half an inch, the exterior an inch, in length ; disk 
faintly radiate ; mouth small, lobate. 
Plate 4, fig. 38, animal natural size ; a, a view of the disk and tentacles.— - 
Abundant in Discovery Harbor, Puget’s Sound, Northwest Coast of America. 
Genus II.— METEIDIUM.— Oken. 
Actinidse attached at base, having some simple naked tenta- 
cles and other frondescent tentacles or appendages, either mar- 
ginal or scattered over the disk, 
Metridium pr^textum {Couthouy). — Very large cylindrical, 2^ inches in 
diameter, and often 6 inches long, exterior smooth, base scarcely dilated and 
neatly crenate at margin, with the crenatures a sixth of an inch broad; 
inner tentacles long (li inches) and flagelliform, rather stout; external a 
little shorter, 3 lines wide, frondescently laciniate or delicately lobed, coal- 
escing by their sides with only the apex free ; a few tubulate pores over the 
surface. 
Plate 5, fig. 39, animal natural size ; «, under surface of exterior tentacular 
appendages ; 6, upper view of disk. — Harbor of Rio de Janeiro. — Eo.p. Ejp. 
Metridium concinnatum {Drayton). — Depressed, 2 inches in diameter at 
middle ; upper and lower extremities dilated ; disk 3 inches broad, strongly 
radiate, margin plicato-lobate ; sides tuberculous, tubercles suctorial ; inner 
tentacles half an inch long, stout, subulate, scattered, channelled and almost 
triangular ; fringe-tentacles external, nearly i an inch long, and 1 to lines 
broad, frondescently laciniate. 
