326 BULLETIN 129, UXITED STATES NATIONAL MUSEUM 



the postero-lateral marginal spine and the posterior of the cardiac 

 spines; the other two form a transversely oblique line near the inner 

 angle of the region. A small tubercle near inner angle of hepatic 

 region. 



Rostrum broad behind, diminishing to base of the short, blunt 

 horns and then widening slightly. Preocular tooth strong. A sinus 

 in lower margin of orbit. Two large pterygostomian spines, followed 

 by a tubercle on the upturned edge of the carapace, in front of the 

 cheliped; a strong, conical tooth or spine at the angle of the buccal 

 cavity and a small tooth in front of it; 2 large teeth on the basal 

 antennal segment, 1 at the antero-external angle and 1 on outer 

 margin. 



Chelipeds of large male not quite so long as first ambulatory leg; 

 a stout, subacute spine near base of merus; palm increasing consid- 

 erably in width toward the fingers, which gape widely at base; 

 dactylus more than half as long as upper width of palm. Ambulatory 

 legs decreasing rapidly in length. 



Measurements. — Male (Ilha Victoria), total length of carapace 69.7 

 mm., width including spines 65 mm. 



Color. — Deep yellowish (Heller). 



Range. — From Rio de Janeiro to Terra del Fuego (Lagerberg). 

 Chile (Milne Edwards and Lucas; Nicolet, in Gay). 



Material examined. — 



Rio de Janeiro, Brazil: Collected by Mus. Nac. Rio; received 

 from Mus. Paulista (H. von Ihering, 337) ; 1 ovigerous female (47826). 

 1872; S^assZer Exped. ; 1 young (1866, M. C. Z.). 



Ilha Victoria, Sao Paulo, Brazil ; 1906; Fr. Giinther, collector; lent 

 by Mus. Paulista (335) ; 1 male. 



Cabo wSanta Maria, Rocha, Uruguay; F. Felippone; 2 males, 3 

 females (54625, 54633, 55770). 



Maldonado, Uruguay; T. G. Cary; 5 males, 5 females (1868, M. 

 C. Z.). 



Isla de Flores, Uruguay; F. Felippone; 1 male (55771). 



Arroyo Pantanoso, Bay of Montevideo, Uruguay; F. Felippone; 

 1 male (44689), 1 ovigerous female (44690). 



Rio de la Plata, below Monte Video, Uruguay; 7 fathoms; Hassler 

 Exped.; 4 young (1867, M. C. Z.); identified by A. Milne Edwards. 



Argentina; oflf Rio de la Plata; lat. 36° 47' GO" S.; long. 

 56° 23' 00" W.; 103^ fathoms; S. brk. Sh.; Jan. 12, 1888; station 

 2766, Albatross; 1 young male, 1 young female (21918). 



Port San Antonio, Patagonia; Feb., 1872; Hassler Exped.; 4 males 

 (1869, M. C. Z.). 



San Matias Bay, Patagonia; Hassler Exped.; 1 immature female 

 (2050, M. C. Z.). 



