404 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



crossed by fine transverse broken granulated lines, but on the whole 

 the carapace is smoother than in Panopeus. Antero-lateral borders 

 horizontal or slightly upturned, as long as or slightly shorter than 

 postero-lateral, arcuate, cut into five (including orbital) shallow teeth 

 or lobes, usually projecting little if at all beyond general line of cara- 

 pace. Second tooth low and rounded and rather closely fused with 

 orbital tooth. Fronto-orbital border half or more than half and front 

 a third or little les? than a third the greatest width of carapace. Front 

 less advanced than in Panopeus; otherwise front and orbits much as in 

 that genus. Orbital hiatus and basal article of antenna narrower 

 than in Panopeus. Chelipeds unequal in both sexes; the fingers may 

 be acute or spoon-shaped or different on the two chelipeds in the same 

 species. Abdomen of male with usually the third, fourth, and fifth 

 segments fused (only fourth and fifth fused in dissimilis). 



From Massachusetts Bay to State of Santa Catharina, Brazil; 

 Bahamas; Bermudas; west coast of Mexico to Chile. 



KEY TO THE SPECIES OF THE GENUS EURYPANOPEUS 



A^ Carapace distinctly convex, especially in the antero-posterior direction. 

 B^ Fingers of minor cheliped spooned. Chelipeds very unequal. 



C. Minor manus two-thirds as high as major. Transverse lines on 



dorsum not strikingly prominent depressus, p. 410. 



C^. Minor manus half as high as major. A few very prominent raised 



granulated lines on dorsum dissimilis, p. 411. 



B2. Fingers of both chelipeds with acute tips, not spooned. 

 C^ Dark color of immovable finger continued on palm. 



Di. Front double-edged, upper edge with a line of granules. 



El. Hepatic region faintly indicated and not crossed by oblique 



granulated lines transversus, p. 407. 



E2. Hepatic region deeply indicated and crossed by oblique 



granulated lines abbreviatus ater, p. 407. 



D^. Front not double-edged. Hepatic region deeply delimited 



ovatus, p. 409. 

 C^. Dark color of immovable finger not continued on palm. 



D'. Carapace moderately convex, well areolated; three lateral sinuses 



of good size abbreviatus, p. 404. 



D2. Carapace very convex, regions faintly marked; lateral sinuses 



slight. crenatus, p. 418. 



A'. Carapace fiat, especially toward the sides. 



Bi. Carpus of cheliped smooth (without grooves). Anterior and antero- 

 lateral regions rough with granules and granulated rugae. _ planus, p. 420. 

 B^, Carpus of cheliped with two grooves at right angles to each other. Ante- 

 rior and antero-lateral regions nearly smooth, finely granulate 



planissimus, p. 421. 



ANALOGOUS SPECIES OF EUBYPANOPEUS ON OPPOSITE SIDES OF THE CONTINENT 



Atlantic Pacific 



abbreviatus ovatus 



EURYPANOPEUS ABBREVIATUS (Stimpson) 



Plate 172, Figures 1 and 2 



Xantho parvulus Milne Edwards, Hist. Nat. Crust., vol. 1, 1834, p. 395, Antilles 

 and Brazil (not Cancer parvulus J. C. Fabricius, 1793). 



