248 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
34. Amphiodia pulehella (Lyman). 
There is a somewhat damaged specimen, probably of this species, which was collected at San 
Antonio Bridge, San Juan. It agrees with the description of pulehella, except that the arm-plates 
(either dorsal or ventral) are not separated from each other. The species has hitherto been known 
only from the coast of Florida, in 18 to 39 fathoms. 
35. Amphiodia riisei (Lutken). 
Reported from the West Indies and Brazil, in shallow water. The three Porto Rican specimens 
were taken in 170 fathoms at station 6066, near Mayaguez. 
36. Amphioplus stearnsii (Ives). 
Previously known only from the Bahamas, in shallow water. The single Porto Rican specimen, 
which is in good condition, was taken in 97 to 120 fathoms at station 6067, near Mayaguez. The disk 
is 5 mm. in diameter, the rays 50 mm. long. 
37. Ophionereis dubia Lyman. 
This species is about the same size as 0. reticulata and is chiefly distinguished by its color. It is 
found in the Mediterranean and eastern Atlantic. There is one very good specimen of an Ophionereis 
and the ray of another from station 6090, which I have referred, after long hesitation, to this European 
species. The disk is 6 mm. and the ray 42 mm. ; the single arm belonged to an individual nearly twice 
that size. The color is reddish-brown, the arms banded with darker. The scaling of the disk is very 
fine. The difference in color between these individuals and 0. reticulata is very striking, but I could 
find no difference by which to separate them from dulda, though the latter has not been recorded 
from the West Indies hitherto. 
38. Ophionereis olivacea, nov. sp. (PI. 14, figs. 10 to 13.) 
Arms 5, rather slender and tapering. Disk about 6 mm. in diameter, almost pentagonal; arms 
about 33 mm. long; . ' . R=5id. Arms abruptly narrowed where they join disk, but 5 mm. from 
disk they are 1 mm. wide. Disk covered with numerous small scales, one at the center and a few 
near the margins being larger than the others. Radial shields narrow, exposed for about one-half 
millimeter, very widely separated. Upper-arm plates near base of arm small, imperfectly triangular, 
with rounded corners; farther out they become more diamond-shaped and are longer than broad; at 
the middle of arm they are broader than long, somewhat 5-sided, with the distal end narrower and 
rounded; near the tip they become small and almost perfectly hexagonal. - Accessory upper-arm plates 
large and. prominent; the first few joints have 2 or more such plates on each side, but farther out 
there is only 1. Arm-spines 3 (figs. 12, 13), of which the uppermost is blunt and equals the joint; 
the middle one is nearly twice as long, at least at the middle of arm, and is broadened and rounded at 
the tip; the lowest is acute and equals the uppermost. Under-arm plates at first almost square, but 
soon become longer than broad, slightly rounded in front. Tentacle scale 1, very large. Oral shields 
small, oval, the madrepore plate obviously larger than the others. Adoral plates small, irregularly 
triangular, pointed and not meeting within; blunt and not meeting without; separating the oral 
shields from the side-arm plates. Oral papillte 4 on each side, the outermost decidedly the widest. 
Above, and largely concealed by the latter, is the pointed oral tentacle scale. Genital slits 2 in each 
interbrachial space. Color above olive green, spotted on the disk with yellow; arms banded with a 
darker shade of green; below the color is very light, the interbrachial spaces being pale yellowish 
marked with olive, while the mouth parts and under side of arms are almost white; outside of oral 
shield is a patch of dark brown, as in reticulata. 
The single specimen of this interesting species (from station 6096) differs very markedly from 
0. reticulata, not only in the color (and in this respect reticulata is very constant) but in the coarser 
scaling of the disk, the shape of the upper-arm plates, and in the size and shape of the second arm- 
spines. The same characters serve to distinguish it from the preceding species, which was taken at 
a neighboring station. The name selected has been chosen on account of the striking color. 
