290 



BULLETIN 120, UNITED STATES NATIONAL MUSEUM 



outer maxillipeds has a transverse distal margin, its outer angle is 

 strongly produced sideways, its inner angle is deeply notched. 



In the full grown male the chelipeds are longer and stouter than 

 the legs; chela almost cylindrical; fingers in contact in the distal 

 half, not hollowed at tips. 



Contains only one species. 



NIBILIA ANTILOCAPRA (Stimpson) 



Plates 102, 103 and 239 



Herbstia . . . Schramm, in Desbonne and Schramm, Crust. Guadeloupe, 

 1867, p. 17, pi. 7, fig. 23. 



Pisa antilocapra Stimpson, Bull. Mus. Comp. Zool., vol. 2, 1871, p. 110 

 (type-localities, off Carysfort Reef, 52 and 60 fathoms; off Alligator 

 Reef, 118 fathoms; types not extant).— A. Milne Edwards and Bouvier, 

 Mem. Mus. Comp. Zool., vol. 47, 1923, pi. 11, figs. 4 and 5; pi. 12, fig. 3, 

 text-fig. 19. 



Pisa praelonga Stimpson, Bull. Mus. Comp. Zool., vol. 2, 1871, p. lH 

 (type-localities, off Alligator Reef, 118 fathoms; off Tennessee Reef, 124 

 fathoms; types not extant). — A. Milne Edwards and Boxjvier, Mem. 

 Mus. Comp. Zool., vol. 47, 1923, p. 384, pi. 11, figs. 6 and 7; pi. 12, fig. 4. 



Nibilia erinacea A. Milne Edwards, Crust. R6g. Mex., 1878, p. 133, pi. 25 

 (type-locality, "Guadeloupe, dans le Canal de Saintes et a Marie- Galante, 

 sur la cote de Capesterre;" from fish-traps set in rather deep water; 

 type in Paris Mus.). 



Diagnosis. — Rostrum deeply bifurcate; carapace multispinous; 

 orbit with a spine or tooth between preocular eave and postocular 

 cup. 



Description.— CuT&psice very spinous. Rostrum horizontal, un- 

 divided at base, but bifurcate for the greater part of its length, the 

 horns varying from three-fifths to four-fifths of 

 the total length of rostrum. Preorbital spine 

 ascending, slightly curved, not as advanced as 

 the base of the horns; behind it a small spine 

 on the supraocular eave; a triangular spine or 

 tooth on the supraorbital border; postocular 

 cup terminating in a spine. A short spine just 

 outside the posterior end of the basal antonnal 

 article, and behind this a tubercle, both in line 

 with a prominent spine at the angle of the buc- 

 cal cavity. Carapace bristling with unequal 

 spines; on the gastric region about 18 of fair 

 size with some smaller ones interspersed; one 

 of the strongest occupies the summit of the gas- 

 tric region and is the center of a circle of smal- 

 ler spines. The same arrangement is seen on 

 the cardiac region. Certain of the hepatic and branchial spines are 

 very long; one marginal hepatic spine is the longest spine behind the 

 orbits; 4 long spines form a transverse diamond on the intestinal 

 region; a regular series of spines runs above the posterolateral mar- 



FiG. 97.— Nibilia antilocap- 

 ra (14091), MAXILUPED, X 



. 3.6 



