BY E. J. GODDARD. 



849 



the segment. They consist of a mass of spherical cells taking a 

 deep stain with hematoxylin. There is no difference in the 

 structure of the gonads of the two segments, except that those in 

 xi. are much the larger, which would enable one on those grounds 

 to suggest that one mass represented male and the other female 

 VI X/ 



,nt 





Fig. 3. — Diagramatic representation of the genital segments. 



int. intestine- np. mass of cells which will become anterior end of 



gonoduct — or. ovary — te. testis. 



organs, the masses in xi. probably representing testes, and those 

 in xii. ovaries. No gonoducts can be seen, but in association 

 with the ventral region of the septum xi./xii., one can make out 

 a mass of spherical cells on the anterior and posterior surfaces at 

 what would be the level of a nephridial funnel. This mass repre- 

 sents the anterior end of what will eventually become the spermi- 

 duct. There are no traces of a nephridium in xii., and the 

 spermiduct is no doubt afterwards developed by a growing back- 

 wards of a coelomo-duct from the coelomostome as in the 

 "limicoline" Oligochseta after the disappearance of the nephridium. 

 In association with the absence of a spermiduct in the immature 

 worm, no trace of a spermiducal gland is present. In segments 

 xiii., xiv., xv., xix. and xx., there is present above the digestive 

 canal a spherical chamber, unpaired and isolated, without any 

 connection between the members of the series. These structures 

 I regard as the remains of spermathecse from a fused condition 

 as represented and initiated in Astacopsidrilus. These chambers 

 measure - 09 mm. in diameter. No traces of a spermathecal duct 



