PLATE XI. 



Mesenckytrceus orcce sp. nov. 



Fig. 1. Spermatheca. One of average size ; in other specimens the ampulla 

 was considerably larger in proportion to the duct. 



2. Section passing through the penial pore. The penial bulb is seen 

 to be unusually small, consisting only of muscle fibers and connec- 

 tive tissue. There are only atrial glands opening into the atrium at 

 or not far from the pore. The atrium is about twice as thick as the 

 sperm-duct. Two sections of the latter are seen in the figure. Only 

 the basal part of the atrium is engaged in the muscles of the penial 

 bulb. 



MesencJiytrceus fontinalis sp. nov. 



3. Part of the spermiducal apparatus ; onlj' part of the duct is shown. 

 There are no prostates, only accessory glands opening at the apex of 

 the penial papilla. The funnel is shown to the left, ^/.c, glandular 

 cells composing the bulb; «/r., atrium; ac.gl., accessory glands 

 opening at apex outside of the bulb. 



J\TeseJZchy tree lis asiaticus sp. nov. 



4. Section through the penial bulb and part of the atrium. The atrial 

 glands and their entrance into the atrium are not shown in the 

 figure, but the ducts of the glands are indicated. 



(14S) 



