26 ON THE MORPHOLOGY OF CYPRINODONT FISHES. . 



Plate III. 



A. Neostethus lankesteri. Transverse section through isthmus and anterior part 



of priapiuni (X 130) ; the right side is aproctal. w., urohyal ; cL, cleithrum 

 of aproctal side ; a., axial bone ; ph., outer pulvinular bone ; g., glandular 

 epidermis ; m., outer muscle of aproctal side. 



B. Fhallostethus dunckeri. Transverse section through isthmus and anterior part 



of priapium, showing the toxactinium articulating with the axial hone 

 (X 130); the left side is aproctal. «., urohj'al ; a., axial bone; te., tox- 

 actinium ; cL, cl.', cleithra ; ^c, pulvinular cartilage ; pa., parenchj'matous 

 cartilage. 



Plate IV. 



A PJiallostetJius duncTceri. Transverse section through part of testis near origin 

 ofvas deferens (X 200). 



B. Fhallostethus duncheri. Transverse section through " epididymis " (X 170). 



C. Neostethus lankesteri. Transverse section through upper part of testis (X 170). 



