PLATE XV. 



Henlea californica sp. nov. 



FIG. i. Penial bulb. The narrower glands open close to the sperm-duct, 

 while the wider and generally larger glands open along the base of 

 the papilla outside of the sperm-duct. The relative difference of 

 structure in the two sets of glands is diagrammatic. The narrower 

 glands possess by far the finest granulation. 



Henlea ehrhorni sp. nov. 



2. One of the salivary glands, dissected. 



3. One of the salivary glands, dissected. The salivary glands in the 

 specimen that was sectioned are typical, and not folded on them- 

 selves as in the dissected specimen. 



4. One of the salivary glands, dissected. 



5. A nephridium. 



6. Penial papilla and bulb. There are four sets of glands, two sets 

 opening into the sperm-duct, and two sets opening in or around a 

 small pore anterior to the spermiducal pore. 



Henlea guatemala sp. nov. 



7. Penial bulb, showing the arrangement of the different glandular 

 cells. 



Fridericia californica sp. nov. 



8. Section through the penial bulb. There is only one kind of unicel- 

 lular glands, sfd., sperm-duct; p.blb., penial bulb. 



9. Chylus cells from the intestine, showing the interior chylus duct. 



