328 A, E. Verrill—The Bermuda Islands; Coral Reefs. 
Ophiocoma Riisei Liitken. Plate xxxivp, fig. 2 (8). 
Ophiocoma Riisei Litken, Vid. Meddel., p. 14, 1856; Add. ad Hist. Oph., pt. 
ii, p. 148, pl. iv, fig. 6. Lyman, Ill. Cat. Mus. Comp. Zool., i, p. 76. 
Verrill, Bull. State Univer. Iowa, 1899, p. 22; these Trans., x, p. 586, 1900. 
Similar in size to last, but has the upper arm-spines slender. 
Usually jet-black or nearly so. 
Common on the reefs. Has the same range and habits as the last. 
Ophiocoma pumila Liitken. Plate xxxivn, fig. 1. 
Ophiocoma pumila Liitken, Vid. Meddel., p. 18, 1856 ; Add. ad Hist. Oph., 
pt. ii, p. 146, pl. iv, fig. 5, 1859. Lyman, Ill. Cat. Mus. Comp. Zool., i, p. 
71, 1865. 
Much smaller than the two preceding. Often has six arms. Colors 
light brown varied with darker. Same range as the last two. 
Ophiopsila Riisei Liitken. 
Ophiopsila Riisei Litken, Add. ad Hist. Oph., pt. ii, p. 136, pl. v, fig. 2, 1859. 
Lyman, Illus. Catal. Mus. Comp. Zool., i, p. 150, figs. 16, 17, 1865 ; Report 
_ Voy. Challenger, Zool., v, p. 160, pl. xl, figs. 1-38, 1882 (anatomy). Verrill, 
these Trans., vol. x, p. 586, 1900. 
Not common ; lives under corals and stones and in crevices. 
Ophiactis Krebsii Liitken. 
Ophiactis Krebsii Litken, Vid. Meddel., p. 12, 1856; Addit. ad Hist. Oph., 
pt. ii, p. 126. Lyman, Ill. Cat., i, p. 111, figs..10, 11. Verrill, Bull. Univ. 
Iowa, v, p. 34, 1899. 
Ophiactis Savignyi (pars) Lyman, Report Voy. Challenger, Zool., v, p. 115. 
A small, rough, green and gray species, usually with six or seven 
unequal arms ; four oral-papille ; upper arm-plates lobed medially. 
It spontaneously divides when young. Lives in cavities of large 
sponges, etc.; common. Ranges from South Carolina to Brazil. 
Ophiactis Mulleri Liitken. 
Ophiactis Mulleri Liitken, Add. ad Hist. Oph., ii, p. 127, 1859. Lyman, 
Illus. Cat., p. 109, 1865. 
Similar to the last in appearance and habits. It has but two oral 
papillz, four rough, short and blunt arm-spines, next to the upper 
largest; upper arm-plates oval, not lobed. Color usually green. 
