GLOCHIDIA-FACTORS UNDERLYING ENCYSTMENT PLATE 3 



LE-LIE B. AREY 



30 mm. 



%-,,-J^' 



C$ 1(S 45 m in 



1^3. 1^ kr-. "■S3^'\ 2 A. 



10 II 



12 13 



14 15 



499 



