BY J. J. FLETCHER, M.A., BS.C. 967 



separate apertures ; in the other the apertures are not visible. 

 There are no traces of accessory copulatory organs, neither adhesive 

 discs nor genital papillae or pores. There are four pairs of sperma- 

 thecal pores, circular apertures between v and vi, vi and vn, vil 

 and vm, viii and ix ; rather lateral in position, and about in a line 

 with the tenth row of setae on each side. Dorsal pores after 

 xi or xii. 



The alimentary canal differs slightly in the position of the gizzard 

 and in one or two other minor points from that of the Queensland 

 perichaste. The pharynx occupies about four segments ; the 

 oesophagus reaches from v to viii, the distal half of the portion in 

 viii dilated into a crop-like portion in front of the large gizzard lying 

 in segments ix and x, the intervening mesentery being entirely 

 wanting ; the small intestine reaches back to xv but gives off no 

 pouch-like diverticula, though in xi and xin the intermesenteric 

 portions are dilated ; the large sacculated intestine begins in xvi, 

 and in xxvi is provided with a pair of long, lateral, tapering 

 cseca, directed forwards and reaching to about xx, but in the natural 

 position the anterior free portions were tucked under the intestine 

 in xxii. 



There are two pairs of testes (1) in segments xi and xn, not race- 

 mose, occupying the whole width of the segment except for the space 

 occupied by the transverse hearts which lie behind them ; divided 

 into two lateral lobes and a small median upper one, all close together 

 in a compact mass overlaying the intestine, those of each pair nearly 

 touching above in the median line ; they are attached in each 

 case partly by fibrous bands and partly by a stalk, to the anterior 

 mesenteries a little below and on each side of the intestine. On the 

 floor of x immediately in front of the mesentery between x and xi, 

 there are apparently two bodies contained in a delicate membranous 

 sac ; while on the floor of xi beneath the anterior testes is a 

 similar but larger mass. These bodies I take to be the two pairs 

 of ciliated rosettes enclosed in membranous sacs, in relation in some 

 way to the testes on the other side of the mesentery in each case ; 

 or there may be one sac enclosing both pairs. The posterior testes 



(1) These bodies,, as also in the next case, are possibly vesicular seminalea. 



