80 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



light lemon yellow. Antero-lateral teeth margined and tipped with 

 purple madder with a splotch of white on median dorsal surface. 

 Branchial spots a cross between purple madder and Indian red, a 

 dark deep rich color, margined or surrounded by a white ring. Fringe 

 of anterior margin of merus of cheliped Ught brown ocher. Tips of 

 fingers like dark end of purple madder; ridges on carpus, tips and 

 bases of all spines same color; spines elsewhere white. Paddles and 

 extremities of ambulatory legs tending toward middle of brown 

 ochre. (Schmitt.) 



Measurements. — Male (61249), total length of carapace 47, width 

 of same 88, width to anterior base of lateral spine 71, fronto-orbital 

 width 28, width of front 10.7 mm. 



Range. — Gulf of Mexico ^^ and Florida Straits to Brazil. Bermuda. 



Material examined. — See table, page 81. 



PORTUNUS (ACHELOUS) AFFINIS (Faxon; 



Plates 38 and 39 



Achelous afflnis Faxon, Bull. Mus. Comp. Zool., vol. 24, 1893, p. 155, except 

 the Mexican specimens (type-localities, off Panama, 56 fathoms, and Ecua- 

 dor, 52 fathoms; cotypes in M.C.Z. and U.S.N.M., Cat. No. 20613); Mem. 

 Mus. Comp. Zool., vol. 18, 1895, p. 23, pi. 4, figs. 1-16. 



Portunus (Achelous) affinis Rathbun, Proc. U. S. Nat. Mus., vol. 21, 1898, p. 

 595; Mem. Mus. Comp. Zool., vol. 35, 1907, p. 71. 



Diagnosis. — Carapace 1.7 times as long as wide. Lateral spine or 

 tooth very little longer than preceding tooth. Merus of swimming 

 legs spinulous. 



Description. — Carapace rather strongly convex, surface rugose, 

 granulate and pubescent, but not so uneven as P. (P.) xantusii. 

 Front not prominent, four triangular blunt teeth, the two submedian 

 a little more advanced and separated from each other by a triangular 

 notch, and by a much broader and shallower sinus from the outer 

 tooth. Inner orbital angle bidentate, inner tooth more advanced. 

 Antero-lateral teeth shallow, becoming progressively sharper from 

 front to back; last tooth, at lateral angle, very little longer than the 

 one before it. Normally five spines on inner margin of arm and a 

 small one at end of outer margin. Inner spine of carpus about twice 

 as long as proximal spine of manus; outer spine of carpus very small. 

 Palm elongate, carinae similar to those of xantusii, the second area 

 below the top narrowing at both ends; superior spine not far behind 

 the extremity, or about the distal seventh. Distal end of merus of 

 last leg spinulous. 



Has much in common with P. (P.) xantusii, but is narrower and has 

 a shorter lateral spine. It replaces that species in more southern 

 waters. 



" An earlier record "North Carolina " is erroneous. 



