THE SPIDER CRABS OF AMERICA 59 



Measurements. — Male, holotype, length (perhaps incomplete) of 

 carapace 20.5, width 18 mm. 



Range. — Known only from off Abreojos Point, Lower California; 

 lat. 26° 16' 15" N.; long. 113° 42' 15" W.; 58 fathoms; gy. S. brk. 

 Sh.; temp. 56° F.: April 10, 1889; station 3044, Albatross; 1 male 

 holotype (17331). 



Genus INACHOIDES Milne Edwards and Lucas 



Xiphus Eydoux and Souleyet, Voy. Bonite, atlas, 1842 (?), pi. 1, figs. 1-6; 

 type, Xiphus margaritifere Eydoux and Soulej'et. 



Inachoides Milne Edwards and Lucas, d'Orbigny's Voy. I'Amer. M^rid., 

 vol. 6, pt. 1, Crust., "1843," p. 4; type, Inachoides microrhynchus Milne 

 Edwards and Lucas. — Eydoux and Souleyet, Voy. Bonite, vol. 1, 

 pt. 2, 1842 (?), p. 219.16— Dana, Amer. Journ. Sci., ser. 2, vol. 11, 1851, 

 p. 432; Crust. U. S. E.xpl. Exped., pt. 1, 1852, p. 83; pt. 2, 1853, p. 

 1421.— A. Milne Edwards, Crust. R6g. Mex., 1879, p. 198. 



Carapace longer than broad; cardiac, branchial, and gastric 

 regions swollen. A preorbital spine may be present or absent. 

 Postorbital tooth present, small, and pointing outward. Rostrum 

 short and simple, with triangular base, terminating in a spine. 

 Basal antennal article with an antero-external tooth; flagellum 

 exposed from its insertion. Merus of outer maxillipeds cut at the 

 antero-internal angle for insertion of palpus; antero-external angle 

 rounded. Abdomen of male with six segments, of female with five. 

 Chelipeds of male enlarged ; palms swollen. Ambulatory legs slender, 

 of medium length, first pair longest; subprehensile, the propodal 

 segments more or less enlarged distally; dactyli curved, folding 

 against the propodi. 



Restricted to America, on the west coast from Magdalena Bay, 

 Lower California, Mexico, to Valparaiso, Chile, and on the east coast 

 from the Gulf of Mexico (west coast of Florida) to Desterro, Brazil. 



KEY TO THE 3PEC1E3 OF THE GENUS INACHOIDES 



A'. Carapace with tubercles and granules. Antennal spines incurved at tip. 



microrhynchus, p. 60. 



A^. Carapace nearly smooth dorsally except for a cardiac tubercle. Postorbital 



spine minute. Antennal spines divergent laevis, p. 61. 



Species on both sides of the continent : laevis. 



'• This synonymy is arranged in the sequence vouched for by Eydoux and Souleyet (Voy. Bonite, vol. 1, 

 pt. 2, 1842 (?), p. 219), who, however, omit dates. It is obvious that the dates here given can not all be 

 correct. 



