DESCRIPTIONS OF SPECIES. 
Order I— ACTINOIDEA. 
Sub-order I. — ACTINARIA. 
Tribe L— ASTR^ACEA. 
Zoophytes, either wholly fleshy or coralligenons ; tentacles 
numerous, in more than one series, or scattered. Often bud- 
ding; buds terminal or sub-terminal, the polyps widening above 
by growth. Coralla calcareous, lamellae of cells numerous, in- 
tersecting the interstices between cells in massive species. 
Family L— ACTINID^E. 
IN'on-coralligenous Astraeacea, not budding, usually attached 
at base. 
Genus L— ACTINIA. 
Actinidae usually attached at base ; tentacles simple and 
naked, retractile. 
I. Tentacles subequal. 
1. Upper margin nniseriately tuberculate. 
a. Tentacles longer than half the disk. 
I. Actinia flagellifera (Dm^fon). — Exterior smooth; If inches hroad 
at middle, upper and lower extremities much dilated (2f inches hroad), margin 
of the summit with a single series of rather large tubercles ; tentacles very 
long (2 to 3 inches), flagelliform, in 3 series ; mouth somewhat prominent, 
elliptical. 
Plate 1, fig. 1. Animal, natural size; a, the same, with part of the tenta- 
cles removed showing the disk; 6, c, d, extremities of the inner, middle, and 
outer tentacles respectively, magnified about three diameters, from drawings 
by J. P. Couthouy ; e, tentacles of another variety. — On rocks near Funchal 
and Camera de Lobos, Madeira. — Exp. Exp. 
