578 BULLETIN 12^+, UNITED STATES NATIONAL MUSEUM 



Fig. 4. Mithrax cornuttis (9502), carapace only, total length 32.4 mm., dorsal 

 view. 



Plate 138 



Fig. 1. Mithrax holderi, female (25567), total length of carapace 27 mm., dorsal 

 view. 



2. Same, ventral view. 



3. Mithrax pilosus, female, type of Cancer aculeatus Herbst in Berlin 



Museum, much reduced. 



Plate 139 



Mithrax hemphilli 



Fig. 1. Male, Guadeloupe, in Geneva Museum, total length of carapace 34.5 

 mm., dorsal view. 



2. Female (21948), total length of carapace 25.3 mm., dorsal view. 



3. Same, ventral view. 



Plate 140 



Mithrax orcutti, female, Mexico, in Philadelphia Academy, total length of 

 carapace 49 mm., dorsal view 



Plate 141 



Mithrax orcutti, same specimen as plate 140, ventral view 



Plate 142 



Mithrax bellii, male (25672), total length of carapace 63.6 mm., dorsal view 



Plate 143 



Mithrax bellii, same specimen as plate 142, ventral view 



Plate 144 



Mithrax verrucosus, male (15075), total length of carapace 47.4 mm. 



Fig. 1. Dorsal view. 



2. Ventral view. 



Plate 145 • 



Mithrax hispidus, old male (41523), length of carapace 84.2 mm., dorsal view 



Plate 146 

 Mithrax hispidus, male (20706), total length of carapace 25.5 mm. 

 Fig. 1. Dorsal view. 

 2. Ventral view\ 



Plate 147 



Fig. 1. Mithrax braziliensis, male (Rio de Janeiro) in Geneva Museum, total 

 length of carapace 23 mm., dorsal view. 



2. Mithrax tortugae, female (50442), carapace 24.8 mm. wide, dorsal view. 



3. Mithrax hispidus, variety, male (21949), total length of carapace 51.1 



mm., dorsal view. 



Plate 148 



Mithrax caribbaeiis, male holotype, total length of carapace 66.3 mm., dorsal 



view. (After Rathbun) 



