Bull. U. S. F. C. 1902. (To face page 36.) 
Plate 6. 
BAMBOO OYSTER COLLECTORS, OR SHIBI, AFTER HAVING BEEN IN USE ABOUT ONE MONTH, A- SIX MONTHS, B- 
EIGHTEEN MONTHS, C. 
Detached oysters are shown at V. Figures about one-third natural size. 
