POnACEA AND E trG MASS 



G-L0CH\01A (MAUN\riED") 



HELISOMA EOCr MASS 



ON CrLASS OF AQUARIUM 



REAR V\EV/ OF CLAM 



TO SHOvj Siphons 



SIDE V > E VJ OF A C L Av M TO SHOW FOOT 



AND D\SCHAR&tD GLOCHlOlA MASSES 



139 



