PLATE VI. 



Mesenchytrceus obscurus sp. nov. 



FIG. i. Section through the spermathecal somite, illustrating the relative 

 size of the spermathecse. Section passes through only one of the 

 spermathecae. 



2. Section through the body-wall of the male-pore, at.gl., atrial glands 

 scattered irregularly all around the atrium and opening into its 

 inner chamber; atr., atrium and sperm-ducts; p.blb., penial bulb; 

 p.gl.-i penial glands inside the penial bulb, opening at the pore ; 

 spd., sperm-duct connecting ultimately with the funnel 



Mesenchytraus eastwoodi sp. nov. 



3. The male sperm iducal apparatus. There are two atrial glands 

 opening into the atrium close to its base and adjoining the penial 

 bulb, atr., atrium; d. at.gl., ducts of atrial glands ; at.gl. > atrial 

 glands ; p-gl>, penial glands opening in the penial bulb. 



(138) 



