NEMATODE GENUS PHYSALOPTERA, 



1073 



Male. 



The males are respectively 14 mm. and 21 mm. long ; they are 

 attenuated only towards the anterior end ; the maximum breadth 

 of the larger male is just in front of the bursa, where it is 725 ju, 

 broad. 



The bursa is Iai*ge, and is nearly twice as long as it is broad ; it 

 forms about 1/1 0*7 of the body-length. The arrangement of 

 the papillse is similar to that found in Pli. antarctica v. Linst., 

 except that the lateral stalked papillse are arranged in two groups, 

 the 1st and 2nd pairs forming a pre-anal group, and the 3rd and 

 4th pairs forming a post-anal group. 



Text-figure 39. 



Fliysaloptera simplicidens, sp. n. 

 A = Ventral view of anterior extremity of body. 

 B = Caudal extremity of male. 



The spicules are slightly unequal, the left being slightly longer 

 and slenderer than the right ; their lengths and breadths are 

 respectively 510 ju by 38 ^a and 410 /x by 50// ; both end in fine 

 points, the right, however, being slightly swollen just behind its 

 middle. 



Host : " Sleeping Lizard." Australia, 



Types in the Helminthological Department of the London 

 School of Tropical Medicine. 



Affinities. — The presence of four uteri and a single tooth allies 

 this species to Ph. coluhri (Rud.), from which species it is, how- 

 ever, distinguished by its much larger size, its relatively much 

 shorter oesophagus, and by the difierence in number and arrange- 

 ment of the post-anal ventral papillse. 



