PLATE XVI. 



Friderlcia sonorce sp. nov. 



Fig. I. Penial bulb and sperm-duct. 



2. Section of the intestine in one of the somites posterior to clitellum, 

 showing three chjhis cells separated by blood vessels. They are 

 lined by an inner ciliated epithelium. On the opposite side is a row 

 of muscular strands covered by chloragogen cells. 



3. A chylus cell, showing interior canal and outer layer of ciliated epi- 

 thelium. The blood is represented as black. Diagrammatic. 



Fridericia santcerosce sp. nov. 



4. Penial bulb, in a transverse section of the body. The bulb contains 

 a row of unicellular glands, p. bib., penial bulb ; sp.d., sperm-duct ; 

 gl.c, unicellular glands inside of the bulb, which constitute the 

 main part of the bulb. 



5. Chylus cells from the intestine. 



Fridericia johnso7ii sp. nov. 



6. A chylus cell from somite xii ; surrounded by two epithelial cells. 

 ep.i epithelial cells; city., chylus cells; bl., blood vessel; chlor., 

 chloragogen cells. 



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