416 



NEMATODES OP THE GENUS PHYSAJjOPTERA, iv., 



side, below the paired lateral teeth; a row of about five sharply-pointed teeth 

 down the lateral margin of the lip on each side (Text-fig. 1). Nerve-ring be- 

 hind middle of muscular oesophagus. What appear to be large cervical 

 at the sides of nerve-ring, extending back to level of junction of muscular 



Fig's. 1-9. Physaloptera hancrofti, n.sp. 



1. Internal view of lip (x 290); 2. Anterior end of body, showing junction of 

 muscular and glandular oesophagus, nerve-ring, and post-cervical papillae (x 30); 

 3. Junction of oesophagus and intestine (x 30) ; 4. Posterior end of female body, 

 showing anus, and caudal pores (x 30) ; 5. Posterior end of male body, showing 

 ductus ejaculatorius, spicules, and arrangement of papillae on caudal bursa (x 30) ; 

 6. Male spicules (x 47-5); 7. Female body in region of vulva, showing terminal 

 portion genital system (x 15) ; 8. Receptaculum seminis and oviduct (x 47.5) ; 9. 

 Egg (x 290). 



glandular oesophagus. Post-cervical papillae only slightly behind this junction 

 (Test-fig. 2). Oesophagus slender, about one-seventh to one-eighth of total body- 

 length; muscular oesophagus very short, and narrower than the glandular; the 

 base of the latter broad and very bluntly rounded, inserted to only a very shallow 

 depth into the lumen of the intestine, where the entrance is protected by valves 

 (Text-fig. 3). Intestine grooved to receive it, the walls forming two enveloping 

 flaps. Intestine behind junction diminishing to narrower diameter than 



Female tail short, sharply-pointed, one-sixtieth to one-sixty-fifth of total 

 body-length, slightly inflected ventrally. Three or four conspicuous dorsoventral 

 muscular bands in region of anus. The two lateral caudal pores on prominent 

 hypodermic elevations opening into large circular depressions in the cuticle be- 

 hind middle of tail (Text-fig. 4). Vulva at 1/3.8 to 1/4.1 of body length from 



