PLATE XVII. 



Fridericia fucJisi sp. nov. 



Fig. I. Longitudinal section of the body-wall, showing the deltoid arrange- 

 ment of the circular muscular layer. The striated cytoplasm of the 

 large epithelial cells is only indicated. 



2. Section through the intestine, showing chylus cells and flat and long 

 epithelial cells. Also interstitial cells with large round nuclei. 



3. A chylus cell and epithelial cells, from the intestine, more highly mag- 

 nified than in the last figure. 



Fridericia macgregori sp. nov. 



4. Set of chylus cells from the intestine. 



5. One of the chylus cells more magnified. 



(160) 



