STRUCTURE OF A GENUS OF OLIGOCH^BTA. 17 



►separates segments XIV/XV are five coelomic cavities ; but the same points are divided 

 by six external furrows. Dr Kosa does not state whether the irregularity is righted 

 further on ; in the meantime it looks as if one segment at any rate were dropped, or 

 rather may be represented by the wall of one of the sperm sacs. 



Finally, I would point out that the egg sacs are unusually large in this group, though 

 they do not nearly reach the size of those structures in the aquatic Oligochseta. I am, 

 therefore, still inclined to retain the Moniligastres in a group apart, though I admit that 

 Dr Eosa's fresh discoveries somewhat weaken my contention that they form a group 

 equivalent to all other Earthworms. They seem to me, however, undoubtedly to lead in 

 the direction of some of the aquatic Oligochseta. 



