THE CANCROID CRABS OF AMERICA 



275 



Measurements. — Male (31085), entire length of carapace 20.4, 

 greatest width of same 34.7, fronto-orbital width 16.6, front 9.9 mm. 



Range. — Bahamas; West Indies. Rare. 



Material examined. — Off Green Cay, Bahamas; in oyster dredge; 

 June 30, 1903; B. A. Bean, Geographic Society of Baltimore; 1 male 

 (31085). 



Guadeloupe; M. Beaupertius; received from Paris Museum; 

 1 female (20265). 



Dominica; 15 fathoms; A. Hyatt Verrill; identified from pencil 

 sketch. 



Martinique; specimen in Paris Museum. 



MEDAEUS LOBIPES Rathbun 



Plate 114 



Medaens lobipes Rathbun, Proc. U. S. ISiat. Mus., vol. 21, 1898, p. 583, pi. 44, 

 fig. 1 (type-locality, Panama Bay, 33 fathoms; type. Cat. No. 21580, 



U.S.N.M.). 



Diagnosis. — Carpus of ambulatory legs with a trilobed crest. Distal 

 end of abdominal 

 segments of male 

 with a band of pubes- 

 cence. Tubercula- 

 tion of carapace fine, 

 inconspicuous. 



Description. — Com- 

 pared to M. spinim- 

 anus, the carapace is 

 shorter and broader, 

 lobules similar in 

 shape and position, 

 their area of tuber- 

 culation diminishing 

 with age; front less 

 advanced, its lobes 

 less oblique. Cardiac 

 and metagastric re- 

 gion each divided by 

 a median sulcus into 

 two lobules. Chelipeds more feebly roughened than in spinimanus; 

 teeth on upper border of hand very unequal, the second, counting 

 from the wrist, largest, the distal one a low tubercle. Ambulatory 

 legs shorter than in the allied species; merus denticulate or spinul- 

 ous on upper margin, carpus with a trilobed crest above, propodus 

 with a row of three smaller lobes or teeth on each side of the upper 

 surface; a similar row on each side of the carpus of the first three 

 legs, and on the outside of the last leg. Legs hairy, especially the 



Figure 44.— Medaeus lobipes, male, holotype, carapace 25.6 mm. 

 wide, dorsal view 



