THE CANCROID CRABS OF AMERICA 545 



Navy; 2 females, 1 young (17804). Duncan Island; Albatross; 2 

 males, 5 females (21984). 



Genus ERIPHIA Latreille 



Eriphia Latreille, Nouv. Diet. Hist. Nat., vol. 10, 1817, p. 404; type, E. 

 spinifrons (Herbst). 



Carapace thick and deep, approaching a quadrilateral shape, very 

 little convex or nearly flat, not remarkably broader than long. 

 Antero-lateral borders slightly curved, much shorter than postero- 

 lateral, and meeting the latter, not at a strong angle, as in most 

 xanthids, but at a very open and imperceptible angle; though spinate, 

 they are not cut into lobes. Fronto-orbital border extremely broad, 

 much more than three-quarters the greatest breadth of carapace; 

 the front is strongly deflexed, almost straight, cut in the middle into 

 two lobes, beyond which the wide inner orbital lobe is in contact with 

 a singularly broad prolongation of the infra-orbital plate. The orbits, 

 which are deep and oval, are therefore completely closed and widely 

 separated from the antennae. Basal antennal article very small, 

 short, and broad; flagellum long, more than the major diameter of the 

 large orbit. The antennules fold transversely. The crests of endos- 

 tome, defining the expiratory canals, are strong, and the canal is 

 completed below by the foliaceous process of the first maxillipeds, the 

 anterior edge of that process being concave. Oblique anterior border 

 of merus of external maxillipeds not notched. Chelipeds massive, 

 unequal in both sexes; fingers stout, pointed, not hollowed. The 

 abdomen of the male has all seven segments separate. 



Inhabits both coasts of middle America; eastern Atlantic and 

 southern Europe to the Indo-Pacific region. 



KKT TO THE AMERICAN SPECIES OF THE GENUS ERIPHIA 



A^ Carapace roughened antero-laterally with tubercles each formed of a row of 

 two or more granules. 

 B^ Male abdominal appendages of first pair with extremity gradually 



tapering and sharp pointed gonagra, p. 545. 



B^. Male abdominal appendages of first pair with thickened, blunt 



tips squamata, p. 550. 



A2. Carapace covered with single granules, coarser in front half. granulosa, p. 551. 



ANALOGOUS SPECIES ON OPPOSITE SIDES OF THE CONTINENT 



Atlantic Pacific 



gonagra squamata 



ERIPHIA GONAGRA (Fabricius) 



CALICO CRAB 

 Plate 222 



Cancer gonagra F.\bricius, Species Insectorum, 1781, p. 505 (type-locality, 

 Jamaica; type in Kiel Mus.). 

 79856—30 36 



