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PACIFIC SCIENCE, Vol. XXI, April 1967 
STAGE 
Fig. 5. Calcium and phosphorus content (mean 
± S.E.) of the gills of P. vigil during the molt 
cycle. 
Fig. 7. Calcium and phosphorus content (mean 
± S.E.) of the mid-gut gland of P. vigil during the 
molt cycle. 
o 
UJ 
5 
Fig. 6. Calcium and phosphorus content (mean 
± S.E.) of the muscles of P. vigil during the molt 
cycle. 
Fig. 8. Calcium and phosphorus content (mean 
± S.E.) of the blood of P. vigil during the molt 
cycle. 
