Castle. — RbynchobdeUidse. 



PLATE 4. 

 G. fusca. 



Fig. 13. Dorsal view of a small individual. For clearness furrows between 

 annuli are represented only at the margin of the body, except where 

 they mark somite boundaries. Testes are shown only in tlie right half 

 of the figure, salivary glands only in the left half. From an entire 

 preparation. X about 34. 



Fig. 14. Parasagittal section of head end. X 52. 



Fig. 15. Head end of young individual viewed from left side. From an entire 

 preparation. X 83. 



Fig. 16. Head end of individual shown in Figure 13. Dorsal view. X 83. 



Fig. 17. Group of reserve-food cells from one of the segmental clear spots marking 

 the sensory annuli. From a living animal. X 365. 



Fig. 18. Ventral view of brain. From an entire preparation. X 208. 



