282 



BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



EUCHIROGRAPSUS AMERICANUS A. Milne Edwards. 



Plate 74. 



Euchirograpsvs avicricaiius A. Mii.ne Edwakds, Bull. Mus. Conip. Zol'A., 

 V(»i. S, ISSO, p. IS (type-locality, Barbados, G9 fathoms, station 27S, 

 llUikc; 1 male. 2 females, cotypes in M. C. /.). — A. Milne Kdwauds and 

 BouviEU, Result, comp. Sclent, tie VUirondcUc, fasc. 7, 1894, p. 4G, pi. 

 4, li;,'s. 10-14. 



Diagnosis. — Square, hairy. Meriis of first pair of maxillipeds not 

 bilobed. Iiirst and second segments and base of third segment of 

 male abdomen covering the sternum. 



Description. — Carai)ace slightly broader than long; sides parallel; 

 flattened posteriorly, sloping gentl}' 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 

 joint of the legs, crossed by fine granulated 

 lines; margins spinulous, a superior subdistal 

 spine, four or five large spines on the distal 

 half of the inner margin. Inner distal margin 

 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 sjMnulous below, and armed with one or a few long 

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

 abort 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. Ej^es 

 black. (Edwards and Bouvier.) 



Dimensions. — Female (ITCTl), length of carapace 14.1, width of 

 same 15.5 mm. 



Liantje. — From South Carolina to Caribbean Sea. Eastern Atlan- 

 tic. 42 to 278 fathoms. 

 Material examined. — See table, page 283. 



Fig. 144. — EucHino- 



CltAl'SUS AMEllICANUS, 

 OUTEK MAXII.I-irED, 



EXl.AKRED. (AFTEU .\.. 



Mii.ne I.dwauds and 



BOUVIEU.) 



of wrist spinulous. 



