THE BRACHYURA AND MACRURA OF PORTO RICO. 
99 
of rostrum and are slightly oblique, submedian equaling about half the length of carapace (exclusive 
of rostrum), the supero-lateral not so long; near posterior end of latter, two or three spinules; both 
these crests are sharply but finely granulated. The infero-lateral crest begins at antennal sinus of 
anterior margin of carapace and is about half as long as submedian crest. Orbit semicircular, a little 
wider than the black cornea which it surrounds; outer orbital angle small and acute; from it the anterior 
margin runs obliquely backward in a sinuous line to a notch 
above antenna; from this notch an inconspicuous fissure runs 
horizontally backward on the carapace to its posterior margin. 
Just outside the antenna, the anterior margin is produced to a 
sharp spine, the outer margin of which is thickened, and white 
and naked, in contrast to remainder of carapace, which is cov- 
ered with a tine, close pubescence; below the white spine the 
anterior margin is again notched; inferior angle, rounded. 
Antennuke above antennae. Antennular peduncle very short, 
rostrum extending to middle of its last segment. First two 
segments very short, third a little longer, flattened, with a 
small spine at anterior outer angle. Flagella subequal in length 
and only a little longer than rostrum. Antennal peduncle a 
trifle longer than antennular. The second joint extends as far 
forward as eye and has a spine at its anterior outer angle; it 
bears a large ovate scale, dentate on its outer margin with four 
or five spiniform teeth; inner margin fringed with long setee. 
Fourth and fifth joints short, subequal, each bearing an outer 
distal spine. Flagellum nearly as long as the body. In fig. 19« 
the left antenna is shown in its natural position, while the right 
one is pulled out to show the outline of the scale. 
The endognath of the outer maxillipeds has ischium and 
merus joints armed on inner side with spinules; merus has an 
outer distal spine; propod us and dactylus subequal in length 
and longer than carpus. The five pairs of thoracic feet missing. 
Abdomen narrower than carapace, gradually tapering posteriorly, smooth, punctate, slightly pubescent. 
Telson longer than broad, rounded at extremity, sides obscurely bispinulous, dorsal surface partly 
spinulous. Lateral laminae longer than telson; inner lamina longer than outer; a transverse spinulous 
line across posterior half; outer half spinulous. 
Dimensions of female: Length from tip of rostrum to tip of telson, 14.5 mm.; length of carapace, 
6.3 mm.; length of antennal flagellum, 11.5 mm. 
Type locality, Playa de Ponce; 1 female (Cat, No. 23782). 
Fig.- 19. — IlmnirnscHs porloricensis , female. 
(а) Carapace and antennae, x 10.66. 
(б) Maxilliped, x 13.33. 
Tribe STENOPIDEA. 
Rostrum laterally compressed. Antennules with two flagella, antennae with a scale. Mandibles 
with a three-jointed palp. Exopod of third maxillipeds is small, slender, and almost rudimentary. 
First three pairs of feet chelate, third pair the longest and largest. Branchiae filamentous. First pair 
of pleopods one-branehed and foliaceous; the uropods and telson have no transverse suture. Contains 
only one family. 
Family STENOPID^. 
Genus STENOPUS Latreille. 
Stenoyus Latreille in Desmarest, Diet. Sei. Nat., xxvm, 321, 1823. 
Second antennae having a long, flat, obtusely pointed scale. Third pair of legs greatly elongate 
and strong; fourth and fifth pairs with the antepenult joint subdivided. Telson tapering. 
Stenopus hispidus (Olivier). 
Palsernon hispidus Olivier, Encyc. Meth., Hist. Nat., Insectes, vm, 666, 1811; Tab]., pi. cccxix, f. 2, 1818. 
Stenopus hispidus Latreille in Desmarest, Diet. Sci. Nat., xxvm, 321, 1823. 
Rostrum with median dorsal row of six spines bifurcated at extremity, a lateral row of three to 
five spines on each side of rostrum; no ventral spines. Behind the sixth dorsal spine a double row. 
