BY J. J, FLETCHER, M.A., B.SC. 959 



segment. Nephridiopores not discernible. The accessory copulatory 

 organs comprise three single pores in the median ventral line 

 between xvi and xvn, xvn and xviii, and xvni and xix ; apparently 

 a small single papilla in the middle of xviii ; and a pair of small 

 papillae also on xviii just in front of, and in a line with those 

 carrying the male pores ; but with the exception of the last their 

 presence is not constant, and some or all of them may be wanting. 

 None of the specimens show any trace of adhesive discs. 



The alimentary canal presents nothing remarkable. The pharnyx 

 extends back about as far as iv, and its hinder portion is coated 

 with a white mass consisting of granular cells, while below it in 

 about in is a pair of tufts of glandular tubules which are probably 

 salivary glands ; the short oesophagus is followed by the gizzard in 

 vi, contained between the two mesenteries of this segment ; the 

 small intestine is devoid of pouch-like diverticula, but in segments 

 xn to xv it is very vascular and the lumen of the intermesenteric 

 portions dilates so as to give them a globular appearance ; the large 

 intestine begins in xvn and has no lateral caeca. 



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

 mose, each of them a narrow nearly cylindrical smooth white body 

 attached to the anterior mesentery of the containing segment, and 

 with the long axis transverse ; the inferior extremities of those of 

 each pair are close to, but independent of each other ; then arching 

 round the intestine they nearly touch superiorly in the median 

 line ; there are two pairs of ciliated rosettes, a pair in each of 

 segments x and xi ; in the specimens dissected the vacant portions 

 of the body-cavity in these two segments were crammed with fully 

 developed spermatozoa probably discharged into them from the testes 

 in the segment immediately succeeding in each case ; the posterior 

 portions of the vasa deferentia join the prostatic ducts close up to 

 the prostates, which are a pair of long laterally incised bodies 

 commencing in xviii and extending back through about the next 

 six segments ; there is a long genital duct on each side with a 

 Z7-shaped bend as in P. australis but differently disposed, in this 

 case the long leg of the U being anterior, and the concavity of the 

 bend turned towards the prostates ; in another specimen however 



