OXYSTOMATOUS AND ALLIED CRABS OF AMERICA 37 



Chelipeds bare, carpus short, chela very long, especially the fingers; 

 these are bent inward toward the base in relation to the palm; they 

 are wider than the palm, gaping a little at base and finely denticulate. 

 The first two pairs of ambulatories are sparsely pubescent at various 

 points, especially on the margins and on the outer surface of the 

 dactyl; this last is longer than the preceding article, compressed 

 vertically and finely acuminate; its inner face is slightly convex 

 and armed with a line of short bristles; its outer face is much more 

 liairy and presents some traces of two longitudinal prominences. 

 The propodus does not narrow sensibly in its distal part and presents 

 a very slight curvature. The last two pairs of feet are a little more 

 pubescent than the others. Abdomen of male characterized by its 

 narrowness and the strong dorsal convexitj'^ of all of its articles, above 

 all those of the median part. The segments are all independent, the 

 sixth shorter than the preceding and much shorter than the telson. 

 (After Milne Edwards and Bouvier.) 



Measurements. — Male (Blake station 49), length of carapace 4.7, 

 width 3.8 mm. 



Range. — Gulf of Mexico to Trinidad, British West Indies. 



Records. — As follows: 



Florida: West of Charlotte Harbor; lat. 26°31'00" N., long. 

 85°53'00''W.; 119 fathoms; 1877-78; station 50, Blake; 1 male, 

 cotype (M. C. Z. no. 6657). 



Louisiana: Off Delta of Mississippi; lat. 28°51'30" N., long. 

 89°01'30'' W., 118 fathoms; 1877-78; station 49, Blake; 1 male, 

 cotype (Paris Mus.). Not examined by the author. 



Venezuela: Northwest of Trinidad; lat. 11°07'00" N., long. 62° 

 14'30" W.; 73 fathoms; bu. M.; January 30, 1884; station 2120, 

 Albatross; 1 young male, soft shell (18455); specimen in bad condition. 



ETHUSA TENUIPES Rathbnn 



Plate 24, Figure 3; Plate 25, Figure 3 



Ethusa tenuipes Rathbun, Proc. Biol. Soc. Washington, vol. 11, p. 110, 1897 

 (t3'pe locality, off Key West, 50 fathoms; type, U. S. N. M. no. 19855); Bull. 

 Lab. Nat. Hist. State Univ. Iowa, vol. 4, p. 293, 1898. 



Diagnosis. — Eyestalks short, the first article of the antenna reach- 

 ing the cornea. Dactyli of first and second ambulatories not com- 

 pressed. Appendages of second abdominal segment very slender and 

 much longer than those of first segment. 



Description. — Closely allied to E. rnicrophthalma but much smaller; 

 shape of carapace and outline of front similar; cardiac region more 

 elevated and surrounded by a deeper groove. Abdomen of male 

 narrow; penultimate segment slightly narrower at distal than at 

 proximal end. The appendages of the first segment have a lanceolate, 

 foliaceous extremity and sheath the appendages of the second 



