"CRIPPLED" SHELLS THAT YIELD PEARLS 159 



Fig. 41. Interior View of the Valuable "Cripple," which Yields 

 the Pearl. 



fully as they may get valuable information from them 

 which might otherwise require years of experience in 

 pearl hunting to secure. 



The interior of the worthless "cripple" is shown in 

 Fig. 40. The interior of this shell should be compared 

 with the interior of the valuable "cripple," which is illus- 

 trated in Fig. 41. 



The fine pearls which are taken from fresh-water mus- 

 sels are usually found in that portion of the shell which 

 is indicated by the arrow in Fig. 41. This portion of the 



