1064 



MR. R. J. ORTLEPP ON THE 



long, with a thickness of 50 /a at its base ; the left spicule 



is long and filiform, varying from 1'8 to 2'8 mm. long; it is 



about 1 5 /i, thick at its base ; both spicules terminate in sharp tips. 



Hosts: Varanus alhigidaris. Stomach. South Africa. 



Psani')no2)his sihilans. ,, 



"Snake." 



" Colubrine snake." ,, 



" Snake." ,, 



Discussion. — My observations differ 

 Seurat(1914 h) made on parasites obtained from Varanus g^'iseus 

 and Cerastes cornittus. Tliese differences apply to the spicules, 

 which are 100 fi and l'92mm. long for the right and left 

 spicule respectively in Seurat's material, whereas in my material 



Text-fiffure 34. 



Sudan. 

 ISTigeria. 

 Sudan. 

 JSTigeria. 

 slightly from those of 



Phi/salojptera paradoxa v. Linsfc. 

 A = Caudal extremity of male. 

 B = Spicules (oulj' part of left indicated). 



the right spicule varied in length from 185 to 240 /x and the 

 left from 1'8 to 2'8 mm. Also the eggs in his specimens are 10/* 

 broader than in mine. Despite these differences I believe the 

 parasite to be the same, and the diffei'ence in size of the spicules 

 can be accounted for in that it is not always possible to measure 

 them coi-rectly, as they generally take up a twisted course inside 

 the body. 



Yon Linstow (1908), in his description of this species, draws 

 attention to the absence of caudal alee on the tail of the male, 

 and for this reason gave it the name '^ paradoxa." Seurat (1914) 



