THE SPIDER CRABS OF AMERICA 231 



Salacia sp.? Brito Capello, Jorn. Sci. Lisboa, vol. 3, no. 12, 1871, p. 263, 

 pi. 3, figs. 3, 3a, 36. 



Diagnosis. — Palms dilated. Merus of ambulatories proximally en- 

 larged. A thick brush of hair on propodus of last three legs. 



Description. — Carapace covered with tubercles and fine granula- 

 tions; short, scattered, fawn-colored hairs in the interregional de- 

 pressions. Rostrum and superior inner border of orbit finely granu- 

 late. Merus of chelipeds ornamented with many longitudinal rows 

 of prominent granules, some of which take the form of more or less 

 spiny tubercles. Manus dilated and covered with fine granules and 

 occasional spiny tubercles. Ambulatory legs granulate; ischium 

 armed above with an erect spine; some spines also on the merus 

 especially of the first two pairs where they form a row continuous 

 with the ischial spine; merus proximally enlarged; granules of pro- 

 podus arranged in rows; propodus of last three legs covered on the 

 upper surface with a brush of numerous, crowded hairs; in the first 

 leg the hairs are confined to the outer border of the same article; 

 dactylus flattened and deeply grooved, a slight swelling in the old 

 at the base of the horny tip. Sternum finely granulate. 



Color. — Carapace yellowish white; tips of walking legs brown. 



Measurements.— Type male, length 52, width 55 mm. (M. E. and 

 L.). Male (Chile), length 60, width 71 mm. (Brito Capello). 



Range. — From Rio de Janeiro, Brazil (Bouvier), to Chile (Milne 

 Edwards and Lucas; Brito Capello). 



Material examined. — Chile( v); 1 male, holotype (Paris Mus.). 



LEUROCYCLUS GRACILIPES (A. Milne Edwards and Bouvier) 



Plates 82 and 83 



Leurocijclus tuberculosus Rathbun, Proc. U. S. Nat. Mus., vol. 21, 1898, p. 573, 

 Microrhynchus gracilipes A. Milne Edwards, MS., in A. Milne Edwards 



and Bouvier, Mem. Mus. Comp. Zool., vol. 47, 1923, p. 387. 

 Salacia gracilipes A. Milne Edwards and Bouvier, Mem. Mus. Comp. 



Zool., vol. 47, 1923, pi. 11, figs. 9 and 10, text-fig. 21 (type-locality, off the 



Rio de la Plata, lat. 40° 22' S., long. 60° 35' W., 30 fathoms; holotype in 



Paris Mus.). 



Diagnosis. — Palms not dilated. Merus of ambulatories not at all 

 enlarged. No brush of hair on propodites. 



DescrijMon. — Closely related to the preceding, but much smaller. 

 Besides the differences noted above, the chelae are longer; the am- 

 bulatories much longer and slender, with the superior basal spines 

 larger. 



Measurements. — Immature male (21907), length of carapace 12.7, 

 width 12.5 mm. Adult male (holotype) length 11.6, width 11,7 mm. 



Range. — Off the Rio de la Plata; 10^ to 30 fathoms. 



Material examined. — Argentina; oft' Rio de la Plata; January 12, 

 1888; Albatross: Lat. 36° 42' 00" S.; long. 56° 23' 00" W.; 113^2 



