384 



3) A second group of cells, the apical lobe, similar to the 

 first but well separated from it. Fig. 1 f—g. The drain-pipe enters 

 it also, runs through it, gets out and re-enters the main lobe in c; 

 it runs through this latter again and gets out of it at the point e. 



4) From e to f runs the recurrent lobe, containing ductules 

 and only once the drain-pipe coming from the main lobe and going 

 to the apical lobe again, where it comes to its end by receiving 

 some of the principal branches of the intracellular network composed 

 of all the ductules running through all the lobes or parts of the 

 organ. 



5) An appendicular lobe, the testis-lobe, containing ductules 

 but no part whatever of the drain-pipe, is attached to the main lobe. 



6) This testis lobe ends at a peculiar ciliated organ that the 

 author calls funnel, not because its form and relations Justine that 

 denomination, but as being evidently homologous with the terminal, 

 really funnel-shaped organ of the chaetopods. 



b) My own way of describing the organ has been very dissimilar 

 to Mr. Bourne's, though not in many points contradictory. 



I have considered it as being from end to end a simple tube. 

 This tube, on the greatest part of its length is surrounded with cells 

 each of which contains a system of ramified intracellular ductules. 

 These ductules are in communication with one another, from cell to 

 cell, and, in certain places, especially in the lower part of the tube 

 they open into the central duct; this relation, on the latter part of 

 the organ, peremptorily demonstrated by micro tomical sections, had 

 been stated by Arn. Lang. 



The distal extremity of the organ is composed of cells exactly 

 similar to those composing the sheath of the tube, but no central tube 

 runs through it. It contains only ductules and evidently corresponds 

 to the testis-lobe of Mr. Bourne. This terminal lobe approaches 

 the ciliated organ — the funnel of Bourne — that I have always 

 regarded as homologous to the terminal funnel of the 

 chaetopods and of the ideal type of nephridium. But it does not 

 enter into direct communication, not even into contact with it; con- 

 nective tissue being always found between them — a fact that I have 

 regarded in my simplicity as rather interesting especially on account 

 of the homology of the ciliated organ with the typical funnel; — and 

 I still continue doing so 1 ). 



1) Let me remark that Mr. Botjene who was formerly much in- 

 clined to admit the actual continuity, makes in his critical article the 



