BY J. J. FLETCHER. 619 



interval between two setie in this region ; a well-marked dorsal 

 interval also, somewhat narrower than the ventral one, about twice 

 the interval between two setae in the dorsal region. 



Clitellum comprises three complete segments, xiv-xvi, and part 

 of XVII, complete all round ; wanting in the smallest specimen. 



Male pores on conspicuous papillae, just ventrad of the third 

 seta on each side. 



Oviduct pores two, on xiv, one on each side of median line. 

 Spermathecal pores four pairs, between each two segments from 

 v to IX, in line with about the eighth seta (the rows of pores are 

 not quite straight and there may be two or three setse dorsad of 

 them) and therefore dorsal in position, so that they are visible 

 when the worm is looked at from above. 



Dorsal pores commence after segment iv. Nephridiopores not 

 visible. 



On the anterior margins of x and xvii a pair of circular depres- 

 sions with raised and swollen margins, one on each side, correspond- 

 ing with the intervals between the first and second or second and 

 third sette ; these may be accessory copulatory structures. 



Alimentary canal: the gizzard may be in v, but being very 

 large and the mesenteries behind it being very thin it seemed to 

 be in vi ; from viii to xiv there are globular, vascular dilatations 

 which are probably calcif erous glands, but there are no diverticula ; 

 the large intestine commences in xvii. 



'to^ 



Genitalia : vesiculee seminales three pairs, in ix, xi and xii ; true 

 testes and ciliated rosettes two pairs, in x and xi ; prostates two, 

 occupying part of two segments, xvill and xix ; genital ducts rather 

 long, S-shaped ; the vasa deferentia join the prostatic ducts close to 

 the prostates, the latter coming off just behind the anterior 

 extremities of the glands. Ovaries and oviducts as usual ; sper- 

 mathecee four pairs, quite dorsally situated, of which the first pair 

 is in VI and the last in ix, long slightly tapering pouches, each 

 with a csecum as long as or even slightly longer than itself. 



