NEMATODE GENtrS PHYSALOPTERA. l02l 



The four circumcloacal lateral papillae are pi'ovided with very 

 long stalks, especially the i^nd and 3rd pairs. The ventral 

 papillae in the immediate vicinity of the anus are small, and 

 consist of three pre-anal papillae in a row, and two pairs post-anal, 

 also in a row. Further down the tail there are three additional 

 pairs ; these are equidistant from each other, the most anterior 

 being situated just behind the level of the last pair of stalked 

 papillae. 



The spicules are slightly bent, unequal, and the right is 

 stouter than the left ; both taper to sharp points. The left is 

 1*2 mm. long by 40 yu thick at its base, and the right is 560^ 

 long by 57 /x thick at its base. 



Host: Mephites chinche. Stomach. Brazil. 



Types in bottle 4458 in the Vienna Museum. 



Some specimens of this species, collected from Mephites 

 7nep)hitica, were handed over to me for identification by Mr. R. I. 

 Pocock, F.R.S. ; he obtained them from animals introduced into 

 Northumberland (England) from Canada, but how long they had 

 been in England before the parasites were collected it was not 

 possible to definitely find out. I wish to express my thanks to 

 Mr. Pocock for this material. 



This material differs from the types studied in that they are 

 slightly larger, and the bursa of the male appears rounded and 

 lobulated ; however, I believe these characters of the bursa to be 

 due to shrinkage, as the worms had been killed in formalin. 



Solanet in 1909 described another species — Ph. mephites — 

 from Mephites suffocans, Buenos Aires. Unfortunately I have 

 not been able to consult his description, and consequently cannot 

 discuss the relation of this species to Ph. inaoaillaris. 



The arrangement of the ventral bursal papillae, the presence of 

 two uteri, general characters of the teeth, ally this species to 

 Ph. semilanceolata, Ph. clausa, and Ph. papillotrimcata. Ph.seini- 

 lanceolata difiei^s from it by its truncated outer tooth, more 

 anterior position of the vulva, shorter left spicule, and type of 

 ornamentation on the bursa. It differs from Ph. papillotruncata 

 by its longer and pointed spicules, ornamentation on the bursa, 

 and smaller size of the adult females. Ph. clausa is distin- 

 guished from it by the size of the spicules, markings on the 

 bursa, and absence of a common trunk to the unpaired female 

 genitalia. 



(5) Physaloptera anomala Molin, 1860. (Text-fig. 8.) 



The material examined consisted of three males and one 

 female ; type-material in bottle 4446 in the Vienna Museum. 

 The material was in excellent preservation. 



The cuticle is finely striated transversely, and is partly reflected 

 over the base of the lips ; the cervical papillae pierce it on either 

 side from 320 to 400 /x behind the level of the posterior end of the 

 muscular oesophagus; the excretory pore is found about 100 /i 

 further back. 



