NfiMATODE GENUS PHYSALOPTEEA. 1023 



of the trunk divides into two branches, each of which connects 

 up with one of the two uteri. 



The eggs are thick-shelled and oval, measuring 38^ long by 

 26 /z broad. 



Male, 



The males are from 30 to 32 mm. long by 1 to .[•2 mm. broad; 

 they are attenuated towards both extremities and the bursa is 

 slightly incurved. 



The caudal bursa is large, and is covered ventrally by 

 longitudinal rows of cuticular elevations. The four pairs of 

 pedunculated papillae are situated three pairs pre-anal and a pair 

 post-anal. Of the three pre-anal ventral papillae the middle one 

 is nearer the anus. There are five pairs of post-anal papillae, of 

 which the pairs 1 and 2 are small, and situated in a row imme- 

 diately behind the anus. Pairs 4 and 5 are large, and are 

 situated in the middle area of the tail. The distance between 

 the 3rd and 4th pairs is about four times the distance between 

 the 2nd and 3rd pairs, and twice that between the 4th and 5th 

 pairs. 



The spicules are short and equal, each measuring 495 jx long 

 by 32 ^ broad at their base ; they are straight, tubular, and 

 pointed. 



Host: Fells onca. Stomach. Brazil. 



Types in bottle 4446 in the Vienna Museum. 



(6) Physaloptera mubis-beasiliensis Diesing, 1861. (Text- 

 fig. 9.) 



Syii. Spiroptera bilabiata Mol., 1860 (not Spiroptera hilahiata 

 (Orep., 1829), Duj., 1845). 



The material studied consisted of ten females in bottle 4525 

 and two males in bottle 4524 in the Vienna Museum. This 

 material constituted the types of this species. 



The cuticle forms a ring round the base of the head, but leaves 

 the lips naked ; it is very finely striated transversely. The 

 cervical papillae are situated about 250 jx behind the level of the 

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

 situated about 100^ further back. 



The lips are large, and each bears two large outer papillae. 

 The external tooth is small, and the inner is of the same size, 

 foliaceous, and tripartite ; no additional teeth were observed. 



The muscular oesophagus is markedly thinner than the rest of 

 the organ, and forms a, little less than 1/lOth of its whole length. 

 The nerve ring encircles it in its posterior l/4th. The oesophagus 

 forms in the female about l/8th and in the male about l/6th of 

 the total body-length. 



Female. 



The length of the female varies from 35 to 43 mm., with a 

 maximum breadth of 1"1 to 1*75 mm. 



