NEMATODE GENUS PHYSALOPTEEA. 



1047 



are arranged in a row, and the central one is the largest. There 

 are five pairs of ventral post-anal papillee ; pairs 1 and 2 are 

 small, and arranged in a line immediately behind the anus. The 

 3rd and 4th pairs are approximated to each other just behind 

 the middle of the tail, and the last pair is at about the junction 

 of the second and last thirds of the tail. 



The spicules are unequal, that of the left side being about 

 2| times as long as that of the right side ; their lengths appear 

 to vary in different individuals, but this may probably be due to 

 the fact that the spicules do not lie straight in the body, but 

 often have a wavy course ; it is thus difficult to measure them 

 accurately ; in this way the left spicule was found to vary from 

 1'4 to 2*5 mm. in length, with a thickness of 32 y at its base; 



Text-figure 23. 



Fhi/saloptera malayensis, sp. n. 

 Lateral view of cephalic extremity. B = Outer view of median teeth. 



C = Caudal extrert>ity of male. 



the right spicule is slightl}^ stouter, and varies in length from 

 580 to 957 |U, with a breadth of 36 /i at its base. Although 

 there is this m^arked variation in the sizes, yet it is worthy of 

 note that the ratio of the two spicules was nearly the same in all 

 cases. Unfortunately there was not sufficient material to allow 

 for the dissecting out of the spicules in a series, in order to 

 determine whether this variation Avas only apparent or real. 

 Hosts : Felis chaus. Intestine. Federated Malay States., 



Felis tigris. (Stomach. Federated Malay States. 



" Tiger cat." ,, Federated Malay States. 



"Bush cat." „ Nigeria. 



" Hysena." Prob. li. striata. Stomach. Nigeria. 



70* 



