PLATE XVIII. 



Lumbricillus annulatus sp. nov. 

 FIG. i. Section through the penial bulb. 



Enchytrceus kincaidi^. nov. 



2. Testis and sperm-sac, the latter projecting into somite x. 



3. Nephridium. It is composed of at least 30 cells. 



4. Sexual bulbs with their papillae, from longitudinal section of the body. 

 The smaller complex is the anterior one. 



Enchytrceus metlakatlensis sp. nov. 



5. Nephridium. 



Enchytraus saxicola sp. nov. 



6. Nephridium. 



(162) 



