126 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Specimens which I refer to this species are from Marco and Punta Rassa, Fla. Some of them nad 
been recorded by Kingsley as Palsemonetes carolinus. They differ from Ortmann’s description and 
figure in having the posterior two of the dorsal teeth more separated than the others. 
One specimen only was taken in Porto Rico, at Mayaguez, with the boat dredge; it agrees in all 
respects with the Floridian specimens, except that the rostrum is only two-thirds as long, having the 
appearance of abnormality. 
Type locality, Brazil, between the continent and the island of San Sebastian, State of San Paulo. 
The Floridian and Porto Rican form may prove to be distinct from the Brazilian, but a compari- 
son of specimens is necessary to determine this point. 
Genus UROCARIS Stimpson. 
Urocaris Stimpson, Proc. Acad. Nat. Sci. Phila., xn, 39 (108), 1860. 
Body slender, compressed; abdomen long, sixth segment especially elongate. Rostrum above 
cristate, dentate; below straight, toothless except near tip. Hepatic spine present. Eye-stalks long. 
Antennulce similar to those of Bithynis. Mandibles not palpigerous. External maxillipeds and feet 
agreeing with those of Bithynis. 
Urocaris long-icaudata Stimpson. 
Urocaris longicaudata Stimpson, Proc. Acad. Nat. Sci. Phila., xn, 39 (108), 1860. 
Rostrum short, not reaching end of penult segment of antennular peduncle; superior crest strongly 
dilated above eyes, arcuate, seven to eight- toothed; lower margin with a tooth near tip. A long 
rounded extra-orbital tooth. Antennal scale longer than antennular peduncle. First pair of feet 
slender, reaching to tip of spine on antennal scale; carpus and propodus equal. Second pair a little 
stouter, middle of carpus reaching tip of antennal scale; carpus, palm, and fingers subequal. Last 
three pairs of feet very slender; dactyli biunguiculate. Abdomen four or five times as long as cara- 
pace, third segment strongly swollen, sixth segment slender, as long as carapace. 
Length, 21 mm.; length of carapace and rostrum, 5.6 mm.; of rostrum, 2.5 mm. 
Mayaguez, 1 specimen; off Culebra, 14| fathoms, station 6086, 1 specimen. 
Carolina (Stimpson); Beaufort, N. C. (Kingsley); Marco Pass and Charlotte Harbor, Fla. (Kings- 
ley); Andros Bank, Bahamas (F. Stearns, coll.); Punta Rassa, Fla., 1 fathom (H. Hemphill, coll.); 
Sarasota Bay, Fla., one-half fathom (H. Hemphill, coll.) ; Marco, Fla., one-third fathom, among sponges 
(PI. Hemphill, coll.); Marco (Grampus)-, Gulf of Mexico, 30 fathoms, station 2405 (Albatross) ; Jamaica 
(Alfyitross) ; off Cape Catoche, Yucatan, 24 fathoms, station 2365 (Albatross)-, off Jacuma, Parahyba, 
Brazil, 15 feet (Branner- Agassiz Exped., 1899). 
Family GNATHOPHYLLIDtE Kingsley, (Gnathophyllinae) 1879; Ortmann, 1890. 
Rostrum short, compressed, toothed. Mandibles without a cutting edge and without palp. 
Third segment of outer maxilliped strikingly broad; both the following segments are small. First 
two pairs of feet chelate, the first pair feeble, the second strong. Contains only one genus: 
Genus GNATHOPHYLLUM Latreille. 
Gnathophyllum Latreille, Nouv. Diet. Hist. Nat., 2d ed., xxx, 72, 1819 ( Gnatophyttum ); Cuvier’s Regne Aniru., 2d ed., iv, 
96, 1829. 
Drirno Risso, Hist. Nat. Eur. Merid., v, 70, 1829. 
Gnathophyllum americanum Guerin. 
Gnathophyllum americanum GuCrin, in La Sagra’s Hist. Cuba, vn, p. xx, 1857; atlas, viii, pi. 11 , f. 14. 
Gnathophyllum fasciolatum Stimpson, Proc. Acad. Nat. Sci. Phila., xn, 28 ( 97), 1860; Haswell, Cat. Austral. Crust., 181, 1882. 
Gnathophyllum zebra Richters, Meeresfauna Mauritius u. d. Seychellen, 161, pi. xvii, figs. 18-20 and 22, 1880. 
? Gnathophyllum pallidum Ortmann, Zool. Jahrb., Syst., v, 537, 1890. 
Body thick. Carapace obtusely carinate dorsally, carina. obsolete posteriorly, and anteriorly 
continuous with rostrum. Rostrum not reaching apex of antepenultimate segment of antennular 
peduncles, obliquely truncate above, a little concave, and five to six-toothed, the extremity acute, the 
lateral carime situated near inferior margin, which has a very small tooth near tip. Eyes rather large, 
having a prominent, conical, obtuse protuberance, pigmented with black, arising from upper part of 
cornea. Caudal segment armed with two marginal spines toward extremity and two long spines at 
extremity. Body marked with ten to sixteen linear transverse bands of color; legs with a band of 
