A. E. Verrill—The Bermuda Islands; Coral Reefs. 279 
The disk is variously colored and variegated. Common colors are 
emerald-green, lavender, chocolate-brown, gray, and flake-white, 
often with an iridescent luster when green. Frequently the colors 
are in radial lines or stripes. The primary rows of tubercles are 
often flake-white or light green on a green ground-color, or gray 
with white specks, alternating with other rows of lavender-color. 
Toward the margin there are often alternating radii of light brown 
and whitish. Inside of mouth often light green, sometimes greenish 
brown. 
The largest specimens observed were 3.5 inches across the 
expanded disk and about 2 inches high ; specimens of 1.5 to 2 
inches in diameter are not uncommon. ‘The larger ones sometimes 
have 2 or 3 mouths on the disk, indicating incipient fission. 
It is also common in the West Indies. 
Duerden in his work of. 1900 (Jamaican Actinaria, pt. II) has 
given an excellent account of its anatomy and histology, which are 
peculiar. There is no definite sphincter muscle, and therefore the 
margin of the disk and column cannot be completely retracted. 
The mesenteries are irregular. Only one pair of directive mesen- 
teries is usually developed, and there is no distinct gonidial groove. 
Nematocysts are lacking in the column wall and disk tentacles, but 
occur at the tips of the marginal tentacles. The mesenterial fila- 
ments are unusually simple and lack the ciliated streaks. 
It is viviparous, but extrudes the young in early stages of develop- 
ment. Duerden found it breeding in September. 
In addition to the preceding species, which are mostly common 
and well known,* the following species was described from a pre- 
served specimen obtained by the Challenger expedition from the 
“Reef of Bermuda.” It has not been observed since that time, so 
far as I know. There may, perhaps, be an error as to the locality, 
but it should be carefully looked for on the outer reefs. 
* Several species of Bermuda actinians have not been described above, because 
they are not ordinarily found on the reefs. They are as follows : 
Cerianthus natans Verrill, Trans. Conn. Acad., xi, p. 47, pl. ix, fig. 6, 1901. 
Phellia simplex Verrill, op. cit., p. 48. 
Bunodopsis globulifera Verrill, op. cit., x, p. 559, pl. Ixvii, fig. 4, 1900 ; Amer. 
Jour. Sci., vii, p. 146, fig. 20, 1899. Duerden, Trans. Linn. Soc. London, 
vili, pp. 297-317, plates 25, 26, anatomy, 1902. 
