314 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 

 XANTHODIUS DENTICULATUS (White), new combination 



Plate 145, Figure 1; Plate 146 



Xantho denticulatus White, List Crust. Brit. Mus., 1847, pwyl7 (novren nudum); 



Ann. Mag. Nat. Hist., ser. 2, vol. 2, 1848, p. 285 (type-locality. West Indies; 



type in Brit. Mus.). — A. Milne Edwards, Crust. Reg. Mex., 1879, p. 252, 



pi. 45, figs. 2-26. 

 Xantho humilis Desbonne, in Desboune and Schramm, Crust. Guadeloupe, 1867, 



p. 27 (type-locality, Guadeloupe; tj'pe not located). 

 Cycloxanihops denticulatus Rathbun, Ann. Inst. Jamaica, vol. 1, 1897, p. 14. 



Diagnosis. — Nine lateral teeth behind orbital tooth. Carapace not 

 very deeply lobulated anteriorly. Median notch of front small and 

 shallow. Wrist and hand rugose and dimpled above. 



Description. — Carapace suboval, multidentate, antero-lateral mar- 

 gin continued well behind widest part of carapace, postero-lateral 

 margins shorter than in typical members of the subgenus Leptodius. 

 Surface deeply sculptured, punctate, and in frontal and antero- 

 lateral portions pitted. 1 L narrow, 2 L, 3 L, and 4 L subcorneal, low. 

 The transverse ridge across branchial region is in line with anterior 

 end of last lateral tooth. 1 M and 2 M fused; 2 M longitudinally 

 divided for not more than half its length. Frontal lobes oblique, 

 median notch minute, outer teeth tuberculif orm ; a groove behind and 

 parallel to margin. The three outer orbital teeth well marked, 

 obtuse. Antero-lateral margin armed with nine, sometimes ten, small 

 blunt, outward pointing teeth separated by U-shaped sinuses; margin 

 considerably behind outer orbital tooth and directed toward outer 

 angle of buccal cavity. 



Upper surface of wrist and hand rugose and eroded; two teeth, one 

 above the other, at inner angle of wrist. Fingers tapering to slender 

 tips, not spooned; immovable fingers bent down except toward the 

 extremity. Lower side of carapace hairy, also upper margins of 

 merus of cheliped and legs; last two articles of ambulatories sparingly 

 fringed below with long hair. 



Color. — Grey with red spots, fingers black (Desbonne). vSome 

 shade of red, purplish red or salmon; usually reddish salmon or pink; 

 on front part of carapace there is often a red spot. Under surfaces 

 whitish, some pale brown spots on abdomen. Chelae pinkish brown, 

 tips dark brown or nearly black. 



Measurements. — Male (22014), length of carapace 19.5, width of 

 same 32.3, fronto-orbital width 12, front 6.8 mm. 



Range. — Bermudas; Bahamas and Florida Keys to Abrolhos Is- 

 lands, Brazil. 



Material examined. — Bermudas: Dr. F. V. Hamlin; 1 male (17806), 

 received from Wesleyan College. W. N. Rankin; 1 male (25823). 

 Hungry Bay; F. G. Gosling; 3 males (25442). 



Abaco, Bahamas; Albatross; 2 males, 1 female (17770). 



