44 



jFirst Annual Hcport 



13 



Figures 13 and 14. Heterostichus rostratus 



Fig. 13, Ventral view of viscera entire. Fig. 14, Alimentary canal of same. G, 

 Liver. E, Spleen, J. Gonads. H, Heart. Numbers refer to corresponding regions 

 of the alimentary canal. 



Figures 15 and 16. Gibbonsia elegans 



Fig. 15. Ventral view of viscera. Fig. 16, Alimentary canal removed. A. Liver. 



B, Spleen. D, Oviduct full of ova. Numbers refer to corresponding regions of 

 alimentary canal. 



