218 BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



ROCHINIA GRACILIPES A. Milne Edwards 



Plate 229, figs. 1-4 



Rochinia gracilipes A. Milne Edwards, Crust. Reg. Mex., 1875, p. 86, 



footnote (type-locality, Cape Corrientes, Argentina; holotype in Paris 



Mus.). 

 Rachinia gracilipes A. Milne Edwards, Crust. Reg. Mex., 1875, pi. 18, 



figs. 1-lrf. — Lagerberg, Schwed. Sudpolar Exped. 1901-1903, vol. 5, 



Lief. 7, Anom. u. Brach., 1905, p. 22. 



Diagnosis. — ^Median tubercles 3; gastric tubercles 3; dorsal pro- 

 tuberances 9; rostrum less than half as long as remainder of carapace; 

 2 short marginal spines (paired). 



Description. — The median protuberances are bluntly roimded, the 

 gastric and cardiac larger than the intestinal. The lateral gastric 

 tubercles are acute. The branchial tubercle either side of the cardiac 

 tubercle is very small. The hepatic and branchial marginal spines are 

 short and conical; between them and only a little higher up on the 

 carapace is a similar but shorter, branchial spine. A short preocular 

 spine or tooth and a similar postocular one. Rostrum of moderate 

 length, slightly deflexed, the outer margins of the horns little diver- 

 gent. A small tooth at antero-lateral angle of basal article of antenna ; 

 a tubercle just outside the base of the article and 2 or 3 tubercles in a 

 row on the pter3^gostomian region. Angles of buccal cavity rounded, 

 margin thickened. A slight notch visible at inner angle of merus of 

 maxillipeds. 



Chelipeds stout; palm broad, less than twice as long as greatest 

 width; fingers not quite meeting at base when closed. 



Measurements. — Male, holotype, total length of carapace 23.5, 

 width 16.2 mm. (A. Milne Edwards). The specimens collected by 

 the Hassler are smaller. 



Range. — From Cape Frio, Brazil, to Cape Horn. Depth, 30 to 55 

 fathoms. 



Material examined. — See table, page 219. 



Additional localities recorded. — 



Cape Corrientes, Argentina (male, figured type, A. Milne Edwards) ; 

 100 meters (Lagerberg). 



East Patagonian Bank; lat. 44° S.; 90 meters (Doflein and Balss). 



South of Cape Horn; lat. 56° 20' S., long. 67° 42' W.; 44 fathoms; 

 Hassler (A. Milne Edwards). 



Remarhs. — ^In the number and arrangement of prominences on the 

 carapace, this species agrees with R. cornuta, but the rostral and lateral 

 marginal spines in the latter are much longer, the anterior branchial 

 spine much higher up and the chelipeds slenderer. 



