1048 MR. R. J. ORTLEPP ON THE 



Types in the Helmintliological Department of the London 

 School of Tropical Medicine. 



Affinities. — This species, because of its labial armature and 

 female genitalia, forms a distinct group with Ph. prcepuiialis and 

 Ph. acuticauda ; to the former it is very closely related, as shown 

 by the similarity of the females and the characteristic reflection 

 of the cuticle over the caudal end in both species ; it differs from 

 it, however, by the arrangement of its post-anal ventral papillae, 

 its larger spicules, and by the presence of unbroken ridges on the 

 ventral surface of the bursa. 



The arrangement of the papillae on the caudal extremity of the 

 male is very similar to that found in Ph. terdentata. Apart from 

 this characteristic, and that these two species are both parasitic 

 in carnivores, there appears to be no close affinity between them. 

 Ph. malayensis differs from Ph. terdentata by the shape and size 

 of its teeth, length of its spicules, presence of unbroken ridges on 

 the male bursa, and in that the cuticle is reflected over the caudal 

 extremit3^ 



(17) Physaloptera terdentata Molin, 1860. (Text-figs. 24 

 & 25.) 



Three bottles of material, Y 1074 from Felis concolor, 4511 

 from I'elis tigrina, and 4513 from P'elis sp., labelled Ph. ter- 

 dentata and deposited in the Vienna Museum, were examined. 

 Bottle Y 1074 contained two males, one of which had its head 

 riiissing. Bottle 4511 contained one female, and bottle 4513 

 contained one male. The male in the last-named bottle proved 

 to be not Ph. terdentata but Ph. prceputialis v. Linst. The 



Text-figure 24. 



Fhysaloptera terdentata Mol. 

 Outer view of lip. 



female from bottle 4511 had all the characters of the female of 

 Ph. prceputialis, except that the cuticle was not reflected over the 

 caudal end, and consequently I am inclined to think that it also 

 is Ph. prceputialis. The material from Felis concolor proved to 

 be Ph. terdentata, and the following description of the male is 

 based on these two specimens. 



The complete male is 14 mm. long, and 400 /^ thick in its 

 jDOsterior third. The body is attenuated anteriorly, and the 

 cuticle is slightly reflected ov^er the lips; externally it shows a 

 coarse annulation, between which a fine transverse striation is 



