A, E. Verrill— The Bermuda Islands; Coral Reefs. 325 
Asterina folium (Liitken) Agassiz. Plate xxxivc, figs. 3, a, b. 
Asteriscus folium Liitken, Vidensk. Medd. nat. Foren., Kjobenhayn, p. 60, 
1859. 
Asterina folium A. Agassiz, Mem. Mus. Comp. Zool., v, pt. 1, p. 106. Sladen, 
Voy. Challenger, xxx, p. 393. 
This small starfish is peculiar in being distinctly blue while living, 
a color very unusual among echinoderms. It is seldom more than 
about .75 inch in diameter (15 to 20™™). It is not uncommon adher- 
ing to the under surfaces of large loose blocks of stone and in 
crevices. 
Linckia Guildingii Gray. Plate xxxive, fig. 1. 
Gray, Ann. and Mag. Nat. Hist., vi, p. 285, 1840. A. Agassiz, North Ameri- 
can Starfishes, p. 105, pl. xiv, figs. 1-6. Verrill, these Trans., vol. xi, p. 
36, 1901. Sladen, op. cit., p. 410. 
Ophidiaster ornithopus Mill. and Trosch., Syst., p. 31, 1842. 
This is easily recognized by its round, slender, finely granulated 
rays, either five or six in number, and very often in process of restor- 
ation after injuries. One ray is even capable of regenerating a new 
body and the other arms. It may become 6 inches or more in 
breadth. It is found under blocks of stone or in crevices, but is 
not common. It is found also in the West Indies and Cape Verde 
Islands. 
OPHIUROIDEA : OPHIURANS. 
The Ophiurans are well represented on the reefs, though most of 
the species hide themselves very effectively in crevices, under stones 
and corals, or in the cavities of sponges.* 
Ophiura cinerea (Miill. and Tr.) Lyman. 
Ophioderma cinereum Miill. and Troschel, Syst. Aster., p. 87, 1842. 
Ophioderma antillarum Liitk., Vid. Meddel., p. 9, 1856; Add. ad Hist. 
Ophiur., pt. ii, p. 88, pl. i, figs. la-le, 1859. 
Ophiura cinerea Lyman, Illust. Catal. Mus. Comp. Zool., i, p. 27, 1865. 
Verrill, these Trans., x, p. 585, 1900. ; 
A large species, variable in color ; usually brown or grayish, often 
specked with darker brown ; arms often banded. The radial shields 
are naked and conspicuous at the base of the arms ; the lower arm- 
* In addition to the reef Ophiurans, enumerated below, the following species 
are found in more sheltered situations in the bays and sounds: Ophionereis 
reticulata, (pl. xxxive&, fig. 2, a), common under stones in sand at low tide mark 
(see above, p. 146); Ophiolepis paucispina ; Amphipholis squamata ; A. Goesi ; 
Ophiostigma isacanthum. 
