61-65. Toxopneiistes 9 X Hipponoe <S^. Acetic acid. 

 66-69. Toxopneustes 9 X Ifipponoe^. 1910. Ordinary sea 



water. 3 days. 

 70-72. Toxopneustes Q X Hipponoc (S^. HCl. 4 days. 

 73. Toxopneustes 9 X liipponoi o^. 1910. Acetic acid. 



4 days. 



11 



74. Toxopneustes 9 X Hipponoi cJ'. 1910. .\ceticacid. 



5 days. 

 75-76 Toxopneustes $ X Hipponoe cJ'. Normal sea 



water. 



77. Toxopneustes 9 X Hipponoe (S^. Acetic acid. 



78. Toxopneustes 9 X Hipponoe 5*. HCl. 



