280 B- H. BuxTON, 



Plate 38. 



Fig. 47. Peripatus nicaraguensis. Adult. Frontal. 250 : 1. 



Typical nephridium near posterior end of body. The long 

 collecting tubule (CT) with ciliated cells leading out of the 

 saccule (S). The labyrinth {CL) changing to the modified part 

 {LM) is Seen on the right of the collecting tubule. 



Fig. 47a. Peripahcs jiiUfonnis. Adult. Transverse. 250 : 1. 



Typical nephridium near anterior end of body with saccule, 

 collecting tubule, labyrinth changing to modified part, and the 

 vesicle (F). Above on the right is the labyrinth sac of the 

 salivary gland {SL). {EP) Epidermis. {GX) Ganglion. 



Plate 39. 



Fig. 47b. Peripatus nicaraguensis. Adult. Transverse. 250:1. 



Typical nephridium. The basophil granules in the cells of the 

 modified part of the labyrinth are clearly shown. 

 Fig. 47c and 47d. Peripahis juliformis. Sagittal. 400:1. 



Showing the change from the labyrinth to its modified part 

 under higher magnification. 



Diagram 3 may be consulted in connection with pbotographs 

 47 to 47b, in order to understand how {CT) and {LM) lie 

 closely apposed without however having any direct connection 

 with each other. 

 Fig. 48. Peripatus jamaicensis. Adult. Sagittal. 100 : 1. 



Salivary gland showing the saccule , collecting tubule and 

 diverticulum which joins the labyrinth sac a little further poste- 

 riorly. {V?^^C) is the ventral nerve chain. {CLR) the stri- 

 ated part (reservoir) of the gland which runs posteriorly under 

 the nerve chain to the eighth leg. The basophil granules of 

 {DSL) are stained very dark with hematoxyliu , without reso- 

 lution of the individual granules. 



Plate 40. 



Fig. 49. Perijyattis juliformis. Transverse. 250 : 1. 



Modified small nephridium of appendage III. (First leg), 

 which has lost all its striated, excretory cells. The whole of the 

 nephridium is shown {NMIII). Above the modified nephridium 

 is a part of the salivary gland, showing the saccule. diverticulum 

 {DSL) with basophil granules and labyrinth sac {SL) with 

 columnar epithelium, cut transversely. {CLR) is a part of the 

 reservoir (Bouvier) of the salivary gland. 



