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PACIFIC SCIENCE, Vol. XX, October 1966 
Fig. 1 . A-E, Electrophoretic patterns of sera from crabs from tidal zone and open water. F-H, Electro- 
phoresis patterns of sera from crabs from mud flats. A, Portunus (Portunidae) ; B, Pachygrapsus (Grap- 
sidae) ; C, Cancer (Cancridae) ; D, Loxorhynchus (Majidae) ; E, Pleuroncodes (Galatheidae) ; F, Hemigrapsus 
(Grapsidae); G, Pachygrapsus (Grapsidae); H, Uca (Ocypodidae) . 
