THE GKAPSOID CRABS OF AMERICA. 175 



KEY TO THE AMERICAN SPECIES OF THE GENUS PINNAXODES. 



A 1 . Carapace subquadrate with corners rounded or obovate. Last segment of 



outer maxilliped overreaching penult segment. Legs not markedly 



slender, propodites not more than 2.5 times longer than wide; dactyl of 



last leg curved. 



B 1 . Carapace soft in female, firm in male. Palms of female elongate. Legs 



narrow. Sixth segment of male abdomen constricted chilensis, p. 175. 



B J . Carapace firm in both sexes. Palms of female not much longer than 

 broad. Legs short and broad. Sixth segment of male abdomen not 



constricted meinerti, p. 177. 



A*. Carapace of female circular. Last segment of outer maxilliped not over- 

 reaching penult segment. Legs very slender, propodites several times 

 longer than wide ; dactyl of last leg straight tomentosus, p. 178. 



PINNAXODES CHILENSIS (Milne Edwards). 



Plate 38. 



Pinnotheres chilensis MILNE EDWABDS, Hist. Nat. Crust., vol. 2, 1837, p. 33 

 (type-locality, Valparaiso; type in Paris Mus.). MILNE EDWARDS and 

 LUCAS, d'Orbigny's Voy. l'Am6r. M6rid., vol. 6, pt. 1, 1843, p. 23; 

 atlas, vol. 9, 1847, Crust., pi. 10, figs. 2 and 2o. 



FaUa chilensis DANA, TL S. Expl. Exped., vol. 13, Crust., pt. 1, 1852, p. 383. 



Pinnaxodes hirtipes HELLEB, Reise Novara, vol. 2, Abth. 3, Crust., 1865, 

 p. 68, pi. 6, fig. 2 (type-locality, Ecuador, in an Echinus; type in Vienna 

 Mus. ) . 



Pinnaxodes chilensis SMITH, in Verrill, Amer. Nat., vol. 3, 1869, p. 245 ; 

 Trans. Connecticut Acad. Arts and Sci., vol. 2, 1870, p. 170. OBTMANN, 

 Zool. Jahrb., Syst, vol. 7, 1894, p. 696, pi. 23, fig. 8. RATHBUN, Proc. 

 U. S. Nat. Mus., vol. 38, 1910, p. 587. 



Pinnaxodes hirtipes ? RATHBUN, Proc. U. S. Nat. Mus., vol. 21, 1898, p. 607, 

 pi. 43, figs. 10 and 11. 



Diagnosis. Carapace soft in female, firm in male. Palms of fe- 

 male elongate. Legs narrow. Sixth segment of male abdomen con- 

 stricted. 



Description of female. Body very soft and yielding; carapace a 

 little wider than long, subquadrate with rounded corners; posterior 

 margin concave ; anterior straight, interrupted by a median sulcus on 

 the frontal region ; lateral sulcus very short, not deep and continued 

 to orbit, as in Fdbia. Eyes, but not margin of front, partially visible 

 in dorsal view. Ventral surface of body, including margin of front, 

 also margins of chelipeds and legs, clothed with long, soft hair. 



Chelipeds stout, elongate ; palms increasing in width to distal end, 

 upper margin straight, lower margin sinuous; fingers stout, a little 

 deflexed, closing tight together, a subbasal tooth on dactyl. 



Legs similar, of nearly equal length, 2 and 3 a little longer than 

 1 and 4; propodites tapering, sides nearly straight; dactyli moder- 

 ately curved, last pair longest. 



Abdomen covering sternum. 



