Sfi'ucfare of an Auj^fndian Land Lcccli. 



229 



Figure D. 



In Philiemou the funnels do not lie in any distinct sinus, but 

 .are connected with the mass of botryoidal tissue attached on the 

 outer lateral edge to the testis sinus. In the nephridia lying in 

 tlie segments VI.-XT., anterior to the testes, I have been unable 

 to distinguish any funnels ; in all 23''obability there are none 

 present as in Hirudo. 



The testicular lobe (5) is con- 

 tinuous with the main lobe or 

 central portion, which to some 

 extent resembles the corresponding 

 part in Hirudo. It consists of a 

 primary intracellular duct together 

 with smaller intracellular ducts 

 opening into one another. 



The cells are distinctly nucleated 

 and their protoplasm has a radially 

 striated appearance. The general, 

 arrangement of the lobes is seen in 

 Fig. D. 

 The main duct (1) leads from the testicular lobe (3) towards the 

 middle line and then in an anterior direction. Tow^ards the anterior 

 border of the segment it turns sharply on itself. This portion in 

 the diagram is figured Neph. 1, and is continued through about 

 two annuli when it again turns and is regarded together with the 

 next twist as Neph. 2, which is slightly dorsal to Neph. 1. The 

 main duct is continued towards the posterior end of the seg- 

 ment where it coils, forming Neph. 3, passing upwards so as to 

 lie between Nephs. 1 and 2, where it is called Neph. 4. From here 

 the duct is single, that is it has no branches, and is surrounded 

 only by the cells forming it. It passes towards tlie side and 

 opens into the thin walled vesicle. (Figs. 20 and D.) 



The vesicle (ves. Figs. 20 and D.) lies to the outer side of 

 the main portion of the nephridium and towards the posterior 

 end of the segment. It is intercellular, being lined by much 

 flattened cells distinctly uncleated, and outside these are a few 

 muscle fibres and connective tissue. 



Tlie main duct of the central portion opens into the vesicle on 

 its inner side, while from its outer lateral mai-gin the excretory 



