THE GRAPSOID CRABS OF AMERICA. 123 



Material examined. 



Miami, Florida; 30 fathoms; John B. Henderson; 1 female holo- 

 type (49230). 



West coast of Florida; lat. 26 33' 30" N.; long. 83 15' 30" W.; 

 27 fathoms; fne. wh. S. blk. Sp.; Mar. 18, 1885; station 2411, Alba- 

 tross,- 1 male (23790). 



Off Montego Bay Point, Jamaica ; dredged ; June 28. 1910 ; E. A. 

 Andrews; 1 female ovig. (49231). 



Jamaica; received from Marine Biological Laboratory, Woods 

 Hole; 1 female (47357). 



DISSODACTYLUS STEBBINGI. 1 new species. 



Plate 28, figs. 1 and 2. 



Type-locality. Sarasota Bay, Florida; Union College Collection, 

 No. G29; 1 male holotype (deposit U.S.N.M., Cat. No. 49232). 



Diagnosis. Antero-lateral margin a thin rim. Dorsal ridges 

 transverse, each covering one-third width of carapace. Sides of male 

 abdomen from third to sixth segment, inclusive, nearly straight; 

 terminal segment wider than long, margin arcuate. Palp of outer 

 maxilliped 3-jointed. 



FlO. 69. DlSJSOIMCTYI.CS STEBBINOI, OUTKB MAXILLU'ED OF MALE HOt.uTVPB, X 63. 



Description of male. Carapace widest at the lateral angles; an- 

 tero-lateral margin beginning at lower edge of orbit and forming a 

 thin, sharp rim which at widest part of carapace turns in a rounded 

 angle and is continued by the less prominent, concave, postero-lateral 

 margin. A transverse, dorsal ridge on either side of carapace oc- 

 cupies a third of its width at the widest part and ends outwardly in 

 the lateral margin; this ridge is anteriorly fringed with hair, while 

 the upper surface of the marginal rim is pubescent and hairy. Front 

 arcuate and continuous with upper margin of orbit. 



Lower surface of carapace and maxillipeds pubescent. Merus- 

 ischium of outer maxilliped spatulate, the blade of the spatula 



1 Named for the Rev. T. B. R. Stebbtng, Tunbridge Wells, England. 



