THE BRACHYURA AND MACRURA OF PORTO RICO. 
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Genus STENORYNCHUS Lamarck. 
Leptopodia. Leach, Zool. Misc., it, 15, 1815. (Not Leptopodia Leach, Edin. Encyc., vn, 431, 1814. ) 
Stenorynchus Lamarck, Hist. Nat. Anim. sans Vert., v, 236, 1818 (part). (Not Stenorhynclius Latrcille, 1825, nor Stenorynchus 
Milne Edwards, 1834. ) 
Carapace triangular, longer than broad. Rostrum very slender, flattened, longer than the 
carapace, its lateral margins spinuliferous. Orbits not defined; postorbital spine small. Eyes short 
and not retractile. Basal joint of antenna very slender; flagellum for the most part concealed beneath 
the rostrum. Epistome very large. Ischium of external maxillipeds produced at its antero-internal 
angle; merus somewhat obcordate, bearing the next joint at its external angle. Abdomen in male 
six-segmented, in female five-segmented. Chelipeds long and slender, with merus, carpus, and palm 
subcylindrical; fingers much shorter than palm, inner margins dentate. Ambulatory legs extremely 
long and slender, especially the dactyli. All the legs spinuliferous. 
Stenorynchus Sagittarius (Fabricius). Arrow Crab; Arana del mar. 
Cancer Sagittarius Fabricius, Ent. Sys. emend, et auet., n, 442, 1793 (part). 
Leptopodia sagittaria Leach, Zool. Misc., ii, 16, pi. 67, 1815. 
Stenorynchus seiicornis Lamarck, Hist. Nat. Anim. sans Vert., v, 237, 1818. 
Stenorynchus Sagittarius Rathbun, Proc. Biol. Soc. Wash., xi, 158, 1897. 
Carapace naked. Length of rostrum varying from slightly longer than carapace to twice as long. 
Propodus of cheliped usually about 2.6 times the length of dactylus, but varies from 2.5 to 4 times. 
Ambulatory legs of first pair from 8 to 8.6 times the length of carapace. 
Carapace striped with bands of white, brown, and black, which extend backward from median 
line to posterior margin. Fingers blue, their teeth orange. Spines of rostrum and feet orange red. 
Dimensions of male: Length of carapace and rostrum, 45.8 mm.; length of rostrum, 28.2 mm.; 
width of carapace, 19 mm. 
From off Cape Hatteras, North Carolina, to Rio de Janeiro, Brazil; Bermudas; Mediterranean; 
West Africa. It, has been found in depths varying from 2 to 814 fathoms, but occurs usually in less 
than 50 fathoms. Porto Rico: San Antonio Bridge, San Juan; Mayaguez Harbor, 75 to 76 fathoms, 
station 6063; off Vieques, 6 fathoms, station 6096. 
Genus PODOCHELA Stimpson. 
Podochela Stimpson, Ann. Lye. Nat. Hist. N. Y., VII, 194, 1860. 
Carapace somewhat depressed, elongate; gastric region narrow, swollen. Rostrum arcuate or 
triangulate, sometimes prolonged in a spine, or very short and bilobed. Eyes with short, stout pedicels, 
which terminate above in a prominent tubercle; cornea oblique, more projecting above than below. 
Postorbital tooth remote from eye and either well developed or reduced to a granule. Basal article 
of an ten me very narrow, longitudinally sulcate in middle. Sternum of male either nearly smooth or 
deeply channeled bet ween the segments; of female concave, deep, margins elevated, laminate, forming 
a capsule. Abdomen of male with last two segments, of female with last three segments, coalesced. 
Chelipeds of moderate length, merus curved, trigonal; palm either slender or dilated. Ambulatory 
legs slender, subprehensile. 
Key to the Porto Rican species of the genus Podochela. 
A. Rostrum thick, flat underneath macrodera 
A'. Rostrum thin, hollow underneath nisei 
Podochela macrodera Stimpson. 
Podochela macrodera Stimpson, Ann. Lye. Nat. Hist. N. Y., vn, 196, 1860; A. Milne Edwards, Crust. Reg. Mex., 191, pi. xxxiv, 
f. 3, 1879. 
Cardiac region depressed, bearing one low tubercle; gastric region with two median tubercles; 
hepatic region swollen, its tubercle very small; a small tubercle on pterygostomian region. Rostrum 
short, thick, subtriangular, obtuse, flat above, margins inclined. Basal antennal joint much narrower 
anteriorly than posteriorly, margins thick and convex, united for anterior third. Sternum of male 
with smooth convex segments separated by shallow grooves; in front of the abdomen are two white- 
