282 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



EUCHIROGRAPSUS AMERICANUS A. Milne Edwards. 



Plate 74. 



Eucliirograpsiis amcricamts A. MILNE EDWARDS, Bull. Mus. Comp. Zool., 

 vol. 8, 1880, p. IS (type-locality, Barbados, G9 fathoms, station 27S, 

 Wake; 1 male. 2 females, cotypes in M. C. /.). A. MILNE EDWAKDS and 

 BOUVIER, Kfeult. comp. Scient. de VHirondcllc, fasc. 7, 1894, p. 4G, pi. 

 4, figs. 10-14. 



Diagnosis. Square, hairy. Merus of first pair of maxillipeds not 

 bilobecl. First and second segments and base of third segment of 

 male abdomen covering the sternum. 



Description. Carapace slightly broader than long; sides parallel; 

 flattened posteriorly, sloping gently down toward the sides and front; 

 surface covered with granules and short soft hair. 



Front advanced, lamellar, with a narrow median notch; outer end 

 of each lobe sloping backward to the small tooth at the inner angle 

 of the orbit. Orbit large; upper margin ob- 

 lique, sinuous, outer angle spiniform; behind it 

 three smaller, subequal spines on the lateral 

 margin, the last much reduced. Eye large, 

 filling the orbit; lower margin of orbit little 

 oblique, denticulate. Third joint of antenna 

 hollowed out on the inner side. 



Cheliped one and one-half times as long as 

 carapace. Surface of arm, as well as the same 



J in t of the ^ crossed *>y fine granulated 

 OUTEK MAxiLi.ii-ED, lines \ margins spinulous, a superior subdistal 



EXI.ABOED. (AFTER A. f fi j J fl JJ fc J 



MILNE KDWAIIDS AND ? , 



BOUVIEK.) half of the inner margin. Inner distal margin 



of wrist spinulous. Palm with three spinulous ridges above, a ridge 

 near the lower edge, and another, less distinct, through the middle. 

 Fingers rather slender, grooved, pointed, teeth low, irregular, fitting 

 together, dactylus a little longer than upper margin of palm. 



Legs slender, compressed, second pair over twice as long as cara- 

 pace. Merus joints armed with a subdistal spine above and two distal 

 spines below, one inner, the other outer; inner spine absent in last 

 pair; first pair spinulous below, and armed with one or a few long 

 spines on the distal half. Legs clothed with long hairs as well as 

 short ones, dactyli armed with long thorns. 



Color. Yellowish-gray, arranged in marblings on the carapace 

 r.nd in transverse bands, alternately light and dark, on the feet. Eyes 

 black. (Edwards and Bouvier.) 



Dimensions. Female (1TGT1), length of carapace 14.1, width of 

 same 15.5 mm. 



Itanye. From South Carolina to Caribbean Sea. Eastern Atlan- 

 tic. 42 to 278 fathoms. 



Material examined. See table, page 283. 



