148 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Genus TJROPTYCHUS. 
Uroptychus uncifer (A. Miln e-Ed wards). 
Diptychus uncifer A. Milne-Edwards, Bull. Mus. Comp. Zool., vm, p. 63, 1880. A. Milne-Edwards & E. L. Bouvier, Ann. 
Sci. Nat. Zool. (7) xvi, p. 306, 1891; also Mem. Mus. Comp. Zool., xix, p. 140, part 2, pi. xi, figs. 1 and 2, pi. xn, 
figs. 17-29, 1897. 
The rostrum extends but a trifle beyond the eyes. Two spines on the antero-lateral angles are ail 
that arise from the carapace, which is markedly smooth. The carapace is broadest about one-fourth 
of its length from the posterior margin; the sides are but little arcuate. The chelipeds are elongated; 
the margins of both the carpus and palm are parallel except near the articulations; fingers of band 
hairy, as are also the dactyls of ambulatory legs; hairs on other parts few and inconspicuous. 
Station 6065, in Mayaguez Harbor, 4 to 6 fathoms, and station 6070, in 220 fathoms. 
Genus MUNIDOPSIS. 
Subgenus Obophoi, hynchus. 
Orophorhynchus platirostris A. Milne-Edwards & Bouvier. 
Orophorhynchus platirostris A. Milne-Edwards & Bouvier, Ann. Sci. Nat. Zool. (7) xvi, n. 287, 1894; also Mem. Mus. Comp. 
Zool., XIX, No. 2, p. 114, pi. IX, figs. 12-15; pi. X, fig. 3, 1897. 
The rostrum is broad at the base; beyond the eye-stalks it forms a nearly equilateral triangle; 
its sides posterior to the ends of the eye-stalks are parallel. Behind the rostrum on the gastric region 
are two tubercles. The sides of the carapace are arcuate and are divided by two small notches into 
three parts; the posterior part is emarginate and twice as long as the lobe-like second part, which is in 
turn more than twice as long as the third division, which includes the antero-lateral angle. The carpus 
and propodus of the ambulatory legs are carinate. The chelipeds are moderately long and stout, the 
hands are oblong-ovate. 
Orophorhynchus is a subgenus of Munidopsis far removed from the typical forms of the genus. 
Station 6070, in 220 fathoms. 
