PART 1 GARTH : PACIFIC OXYRHYNCHA 95 



Panama, included a single male specimen, indicating that E. spinosus 

 is to be looked for in the intervening territory, and perhaps as far south 

 as Ecuador. 



Genus INACHOIDES Milne Edwards and Lucas 



Xiphus Eydoux and Souleyet, 1842 (or 1843), pi. 1, figs. 1-6; type: 



X. mar gariti fere Eydoux and Souleyet. 

 Inachoides Milne Edwards and Lucas, 1842, pi. 4, figs. 2, 2a-m; 1843, 

 p. 4. Eydoux and Souleyet, 1844 (or 1845), p. 219. Dana, 1851b, 

 p. 432; 1852, p. 83. A. Milne Edwards, 1879, p. 198. Rathbun, 

 1925, p. 59. 



Type: Inachoides microrhynchus Milne Edwards and Lucas, by 

 monotypy. 



Description: Carapace triangular, pointed in front, broad and 

 swollen behind. Rostrum short and styliform, always simple. Orbits 

 entire; their superior angle very small and the eye not retractile. Basal 

 article of the external antennae narrow, the unprotected movable flagel- 

 lum inserted on the sides of the rostrum. Epistome large and nearly 

 quadrilateral ; merus of the external maxillipeds notched in front for 

 the insertion of the palp, its anteroexternal angle rounded. Chelipeds of 

 the male swollen ; ambulatory legs of moderate length and terminated 

 by styliform dactyls. Abdomen of the male formed of seven articles; 

 that of the female numbers only five, the fifth, sixth and seventh being 

 united. (A. Milne Edwards) 



The following supplementary information is given by Rathbun: 

 Postorbital tooth present, small, and pointing outward ; preorbital spine 

 present or absent. Basal antennal article with an anteroexternal tooth. 

 First pair of ambulatory legs longest, subprehensile, the propodal seg- 

 ments more or less enlarged distally; dactyli curved, folding against 

 propodi. 



With respect to the characteristic terminal modification of the 

 propodus the description of Milne Edwards and Lucas is beautifully 

 explicit: The legs . . . have their penultimate article prolonged 

 posteriorly in a lamination, on the rounded margin of which slides, as 

 on a pulley, the last article or the tarsus. 



Range: From Cedros Island and Scammon Lagoon, west coast of 

 Lower California, and Rocky Point, Gulf of California, Mexico, to 

 Chonos and Chiloe, Chile ; in the Atlantic from Deadmans Bay, Florida, 

 to Desterro, Brazil. 1.5 to 56 fathoms. 



