NEMATODE GENUS PHYSA.LOPXERA. 



1049 



visible under high magnification. The cervical papillre are 

 lodged about 100/z behind the posterior limit of the muscular 

 oesophagus, and the excretory pore is situated slightly posterior 

 to them. 



The lips are large and flatly rounded, and each carries two 

 large and spherical outer papilla; — one in the subdorsal and one 

 in the subventral line. The two terminal teeth are well-defined, 

 the outer being short and stumpy, the inner large and tripartite. 



The oesophagus is straight, and consists of the usual two parts ; 

 it is 2-3 mm. long or about l/6th of the total body-length. Its 

 anterior glandular part is slightly thinner than the part following, 

 is 240 /u long, and has the nerve ring situated in its posterior 

 quarter. 



The bursa is elongate with rounded tip, and forms nearly 



Text-figure 25. 



Fhysaloptera terdentata Mol. 

 Caudal extremity of male. 



l/15th of the body-length. Its lateral alse are supported by four 

 pairs of equidistant and somewhat slender stalked papilla?, and are 

 arranged two pairs pre-anal and two pairs post-anal in position. 

 Its ventral surface has longitudinal rows of irregular cuticular 

 bosses. The pre-anal ventral papillae are situated close together 

 in a row just above the anus, and the middle one is slightly 

 larger than the other two. The post-anal ventral papillae consist 

 of five pairs, of which pairs 1 and 2 ai-e small and arranged 

 in a row just posterior to the anus, pairs 3 and 4 are situated 

 close behind each other in about the middle of the tail, and 

 pair 5 is found at the junction of third and last quarters 

 of the tail. 



The spicules are only slightly subequal, the left being 320 p. 



