THE ECHINODERMS OF PORTO RICO. 
235 
CRINOIDEA. 
SEA LILIES. 
The erinoids comprise a very insignificant part of the Fish Hawk collections, 
and there are no stalked forms among them. There are not a half dozen specimens 
all together, although there are fragments of many arms. They represent three 
common West Indian species of Cornatulce , collected at five different stations, and 
may lie distinguished from each other by the following characters: 
A. Mouth approximately in center of disk. Oral pinnules without a “ comb” near tip Antedon hagenii 
B. Mouth at side of disk. Oral pinnules with a “ comb” of coarse teeth on inner side near tip. 
1. Color pale. Pinnules without minute spines or hooks on each joint Actinometra mcridionalis 
2. Color red-brown, with a longitudinal black stripe on aboral side of arms. Pinnules with 
minute spines or hooks on each joint Actinometra rubiginosa 
Antedon hagenii (Pourtales). 
This has been called the commonest crinoid of the West Indies. It was first collected by Pour- 
tales in the Straits of Florida, and has since been found widely distributed in the Caribbean Sea. 
The calyx is about 20 mm. across; arms 100 mm. long. There is one calyx and fragments of many 
arms from station 6067, where they were dredged on a coral bottom at over 100 fathoms depth. 
Pourtales says the color is “pale-greenish, turning white in alcohol.” The fragments of arms before 
me are almost white, but are banded with pale brown, and near the base is a longitudinal pale-brown 
stripe on the aboral side. 
Actinometra meridionalis ( Pourtales) . 
Originally described by Pourtales from specimens collected in Florida Straits, but now known as 
a common and widely distributed form in the western Atlantic. Somewhat larger than the preceding. 
There are 4 calyces of this species, with portions of arms attached, from station 6063. The longest 
arm measured 125 mm. There are also fragments from station 6066. This specimen was collected 
with a trawl on a rocky sand bottom at a depth of from 75 to 172 fathoms. 
Actinometra rubiginosa ( Pourtales) . 
First described from south of Florida, its range eastward being greatly extended by its collection 
at the eastern end of Porto Rico. About the size of the preceding and more handsomely colored. 
Fragments of arms collected with a tangle on a coral bottom at stations 6088 and 6090, at depths of 16 
to 23 fathoms, seem to be referable to this species. They are dark reddish-brown, with a longitudinal 
black stripe on the aboral side. 
Numerous other species of erinoids have been collected in the Caribbean Sea, 
but it is impossible to say what forms may be expected to occur in the Porto Rican 
waters. It is worth noting, however, that the three species collected by the Fish 
Hawk are not only all Cornatulce (erinoids without stalks, not attached when adults), 
but belong to the 10- armed series of that group. Several Cornatulce , having 15 to 20 
or more arms, may be looked for, while other 10-armed species undoubtedly occur. 
Of the stalked erinoids, Pentacrimos decorus W. Thomson has been recorded from 
the “ south side of Porto Rico” (Fewkes, Bull. Mus. Comp. Zool., vol. x, p. 181) and 
three other species of the same genus are also known from the West Indies, all col- 
lected in water of over 70 fathoms depth. The curious little Holopus, which has been 
recorded from the north side of Cuba and from Barbados, may he looked for attached 
to rocks in comparatively shallow water. 
