WILLIAMS: MUD CRAB. PARTITION INTO SIX SPECIES 



FIGURE 4. — I'anopi'us lacustris. Male from southern Florida (USNM 75643); a. Carapace in dorsal view; b, Major chela in oblique dorsal view 

 showing broadened "molar" teeth on fixed finger. Female from St. Croix, W.I.; c, Carapace in dorsal view; (/, Major chela in frontal view, e, Male 

 from Panama (YPM 470), major (left) chela in frontal view, teeth of fixed finger worn. 10 mm indicated. 



869 



