1018 



MR. R. J. ORTLEPP ON THE 



irreg-ular course ringing, probably due to contraction ; in some 

 cases it is completely reflected over the lips, and in others only 

 the base of the lips are covered. 



The cervical papillse are situated about 300 /x, behind the level 

 of the hind end of the muscular oesophagus, and the excretory 

 duct opens about 90 fx further back. 



In the specimens examined the oesophagus was thrown into 

 loops, po that a correct estimation of its length could not be 

 determined ; roughly, it forms in the male about l/5th, and in 

 the female about l/6th of the total length. 



The lips are flatly rounded, and each bears two large terminal 

 teeth of the same height ; the outer tooth is markedly truncated, 

 whereas the inner is foliaceous and tripartite. Each lip has on 

 its outer surface a prominent subdorsal and subventral papilla. 



Female. 



The females are coiled, and mature specimens average in length 

 from 21 to 37 mm. long by -9 to 1*5 mm. thick. The body is of 



Text-fieure 6. 



Fhysaloptera semilanceolata Mol. 

 A = Evterno-lateral view of liead. 

 B = Caudal extremity of male. 



a more or less uniform thickness thi'oughout, except for the 

 anterior i/lOth and posterior few millimetres. The tail in all 

 specimens examined was bent dorsalwards. It tapers only 

 slightly towards its tip, which is very bluntly roxinded ; the 

 caudal pores open in its posterior l/5th. 



The vulva opens very far forwards, in some specimens its 

 position being just anterior to the hind end of the oesophagus 

 and in others just behind it. It leads into a long and coiled 

 vagina about 3 mm. long by 110 /x broad; its posterior end 

 gradually widens to join the swollen egg-chamber, which, when 

 distended with eggs, measured 2*75 mm. long by 440 jj. broad. 

 The common trunk is relatively short and slightly thinner than 

 the vagina; it measured about 475 /x long by 95 /x thick. The 

 two uteri which arise from it may first pass forwards, and then 

 recurve to pass down the length of the body. 



