172 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
CYMOTHOIDj'E. 
Anilocra laticauda Milne-Edwards. 
Ovigerous female. Body elliptical, about 2.6 times as long as broad. 
Head of moderate size, subtriangular, about as long as first segment of trunk, about two-thirds 
as long as broad, front of head produced. 
Eyes oval, half as long as lateral walls of head, about two-thirds as wide, distant from one 
another somewhat more than their length. 
First antennae 8-iointed, reaching to about posterior border of eye; peduncle dilated, second 
joint with anterior distal angle expanded; flagellum at an angle with peduncle, flattened. Second 
antennae dilated, consisting of 9 to 10 joints, reaching to about middle of first trunk segment. 
Thoracic segments gradually increasing in length from second to sixth, seventh about equal to 
third, first, and fourth about equal. Anterior margins of first distinctly retreating behind eyes, first, 
second, third, fourth, and fifth rounded at posterior lateral angles, sixth somewhat produced, seventh 
strongly produced and reaching to angle of first abdominal segment. Epimera of second and third 
broadly rounded posteriorly, reaching to about posterior margin of segments; of fourth more slender, 
reaching to beyond middle of its segment; of fifth, sixth, and seventh more slender, sinuous, and 
reaching to about middle of their respective segments. 
The legs are in two series, the first three are directed forward and inward, and the last four 
backward. They increase in length from before backward. The first pair have the second joint short 
and stout, the fourth and fifth subequal, the sixth longer and about equal to the third, the terminal 
joint with a stout curved claw, reaching to fourth joint when indexed. The second joint with a 
keel on anterior outer edge. The next five pairs are subsimilar. The seventh pair much longer than 
the others, all of the joints except the seventh being lengthened, claw when reflexed reaching only to 
fifth joint; the first joint with the outer face with a shallow groove. None of the legs with spines or 
setae. Six segments of pleon distinct, about' one-third the length of body, first five segments shorter 
than the telson, about two-thirds as long as broad; first segment partly hidden dorsally by last thoracic 
segment, the rest of the segments subequal, laterally produced, the posterior lateral angles all exposed, 
of first and second rounded, of third and fourth notched, of fifth strongly notched and fitting around 
the sides of base of telson. 
Telson subcircular, about as broad as long, with a depression on each side near base. 
Uropods reaching to about end of telson, internal branch broader and a little longer than external, 
rounded posteriorly; external ramus falcate. 
Color plumbeous. 
From Arroyo and Vieques. Two specimens, 35.5 by 14 mm. and 13 by 5 mm. 
SPH^ROMIDiE. 
No attempt is made to furnish a key to the genera owing to the extreme confusion that exists 
in this family, and it is doubtful if the following two species are properly assigned generically. 
The dissimilarity of the sexes has frequently misled authors into placing them in widely separated 
genera, and, while this has not been done in the present case, the limitations of the genera are so 
indefinitely established that the author has not been able to satisfy himself of the generic affinities of 
the species described. 
Cilicea caudata Ives. 
Body of male twice as long as broad. Head about 2.5 times as broad as long, produced in a 
rounded process between the bases of the first antennae, above each of which there is a rounded 
notch; rest of frontal margin thickened. Eyes convex, in posterior lateral lobes. First segment 
about two-thirds as long as the head, laterally notched to receive the lobes of head and produced 
beneath the eyes, next four about two-thirds as long, the sixth and seventh about equal to first. 
Lateral margin of first segment long, slightly produced backward and sharply angled at each end; 
posterior margins of following segments somewhat deflected backward at sides. The sides of seg- 
ments two to six are narrower externally than the dorsal portions, owing to the thinning of the ante- 
rior border to form a ridge over which the grooved posterior surface of the preceding epimeron rides. 
The last thoracic segment does not extend so far ventrally as the preceding ones. 
