J. E. Duserpen—Jamaican Actiniaria: Part I—Zoanthee. 339 
Zoanthus flos-marinus, Ducwassaina and MIcHELOrTI. 
(Pl. xvu.a, fig. 2.) 
Zoanthus flos-marinus,  . : . Duchassaing and Michelotti, 1860, p. 326, 
pl. vii., fig. 6. 
Zoanthus flos-marinus,  . : . Andres, 1883, p. 328. 
Zoanthus flos-marinus, . : . M°Murrich, 1889, p. 118, pl. vii, figs. 3, 4. 
Form.—Polyps erect, smooth, thin-walled, pellucid, clavate or cylindrical ; 
arising either directly from a thin band-like incrusting ccenenchyme, or from a 
free irregular stolon, or from the base of one another. In full retraction, a 
little swollen above; in partial contraction, inner capitulum very narrow, with 
24 to 30 minute rounded denticulations or capitular ridges, continued as thin 
lines for some distance down the column, and corresponding in number and 
alternating with the outer row of tentacles. 
Tentacles dicyclic, slightly entaemzeous, smooth, acuminate, overhanging in 
full extension, variable in number, from 48 to 60. In one colony, the numbers 
counted were 60, 52, 58, 54, 50, 54, 58; in another colony, 56, 50, 50,48. In 
this latter colony, a curious condition of the tentacles was met with, each bearing 
near its origin one or two small tubercles,* suggestive of an additional cycle. 
Disc thin-walled, with the radiating mesenterial lines showing through ; 
outer part grooved, overhanging in full extension; central portion elevated and 
rounded; mouth slit-like. Coenenchyme occasionally band-like and incrusting, 
more often stolon-like, constituting an irregular connexion for the polyps. 
Polyps, all about the same size, are often closely associated in a colony, and 
incrust some rock or stone; at other times, they are loosely attached to any 
object, and form bunches connected with one another in an irregular fashion by 
the loose stolon-like ccenenchyme. Sometimes the polyps are united to one 
another some distance above the base. Examples on the upper surface of stones 
are usually short and cylindrical; but those along the sides and underneath, or 
in crevices, become much elongated and narrow below. 
Colouwr.—Lower part of column sand-coloured; upper dark green or lead 
colour ; tentacles yellowish-green, blue-green, or brown; disc various light and 
dark shades of blue and green, often mixed with yellow and black; peristome a 
bright yellow or green; a darker triangular area at each or only one angle of 
the mouth may be present. 
Dimensions.—Dimensions variable; column usually about 1:7 cm. in length ; 
* Verrill records a similar condition for Wammillifera Dane (1869, p. 496), and for Epizoanthus elongatus 
(p. 498). It is not general in the present species. 
3F2 
