PLATE III. 



Actinobdella inequiannulata. 



Fig. 19. The external morphology, of the dorsal surface. Somites 

 XIII-XXI are omitted as they are precisely similar to those 

 immediately preceding and following them. The furrows 

 are drawn more regularly than they are in nature, x 35. 



Fig. 20. A small portion of the margin of the caudal sucker, viewed 

 from within, showing four of the papillae. The gland 

 ducts are stippled and the muscles are represented by lines. 

 x 130. 



Piscicola punctata. 



Fig. 21. The first twelve and one half somites seen from the left side, 

 showing the annulation as it appears in a well extended 

 example. The limits of the somites anterior to VII and of 

 X and XI are open to some doubt, x 35. 

 Fig. 22. The dissected reproductive organs seen from the dorsal side. 

 The testes of the right side and the ovary of the left side 

 are omitted. The left spermduct is drawn forward to dis- 

 play its parts more fully. 



de Ejaculatory canal of the spermduct. 



gp Prostate gland. 



ov Ovary. 



ss Sperm sac. 



vd Vas deferens 



v'e Vas efferens 



tl-t5 .... Testes of the left side 



Haemopis lateralis, x 5. 



Fig. 23. Lateral view of the first eight somites, showing the annulation 

 and eyes of the left side. 



