1026 



MR. R. J. OKTLEPP ON THE 



dividing the body into the ratio of 1 : 1-07 to 1 : 1-4. The vagina 

 is straight, and may eitlier pass forwards or backwards ; it is 

 muscular, about 1| mm. long and 60 /t thick. The egg-chamber 

 may pass forwards with the vagina or be bent backwards ; it is 

 about half the length of the vagina, and its breadth varies 

 according to whether it is distended with eggs or not. The 

 common trunk is short, and is nearly 300 ^u long; its posterior 

 end divides into two to give rise to the two uteri. 



The eggs are thick-shelled and oval, measuring on the average 

 41 /i long and 23yu in diameter. 



Male. 



The two males are respectively 17 and 18 mm. long, and 

 are '5 mm, thick in their posterior third. The body is much 

 attenuated in its anterior half. 



Text-fiOTire IC. 



A 



Fhysalojatera alata Rud. 

 J^ & "B = Ventral view of lips, showing variations in size of the external tooth. 

 C = Caudal extremitj' of male. 



The bursa is relatively narrow and lanceolate in shape. There 

 are five pairs of pedunculated lateral papillse, of which two pairs 

 are pre-anal and the rest post-anal in position ; the anterior four 

 pairs are equidistant from each other, whereas the distance 

 separating tlie 4th and 5th pairs is about three times that 

 separating the other pairs ; this last pair is also more ventral in 

 origin than the others. There are five pairs and an unpaired 

 ventral papillse ; one pair and the unpaired papilla are situated 

 in a triangle in front of the anus, the remaining four pairs being 

 post-anal. The 1st and 2nd post-anal pairs are small, and are 

 found on the posterior margin of the anus ; the 3rd pair is 

 situated just behind the level of the 4th pair of stalked papillse ; 



