|- Stomach. Australia. 



1070 MR. R. J. ORTLEPP ON THE 



The bursa is hxrge, being about 2j mm. long by 1| mm. broad 

 across the cloaca. The lateral expansions are well developed, 

 and the central portion of the ventral surface is covered by 

 longitudinal rows of spike-like tubercles. The anus is atriradiate 

 aperture, situated in the centre of a more or less circular cushion 

 like a swelling, about 420 jx in diameter, and itself covered with 

 small tubercles. On either side of it there are four elongate 

 papillas, implanted equidistant from each other. Anterior to the 

 cushion there are three ventral papillee of equal size and situated 

 in a row; immediately posterior to the cushion there are two small 

 pairs of ventral papillfe. There are three other pairs of ventral 

 papillje further down the tail, of which the middle pair is nearer 

 to the anterior than to the posterior pair. These last three pairs 

 of papilliTe are each provided with a short stalk. 



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

 than that of the I'ight side. The left spicule measures 1504 /a long 

 by 19 /x broad at its base ; at its tip it widens out to form a kind 

 of spear-head 64 jx long by 18 /x broad The right spicule is stout, 

 and measures 410 /a long by 33 /a broad at its base. In its pos- 

 terior two-fifths it becomes slightly widened out, after which it 

 gradually tapers to a point. 



Hosts : Varanus varius. 

 Python spilotes. 



My material has been identified as Ph. antarctica v. Linst. 

 because of the general agreement of the measurements of my 

 material with those of von Linstow's ; the only important differ- 

 ence is the relative length of the tail of the female ; von Linstow 

 gives it as l/54th of the body-length, whereas in my material 

 it forms only about half this length. 



Only two species have so far been described from Australian 

 lizards — namely, the species described by A^on Linstow and Ph. 

 alba described by Stossich (1902). Irwin-Smith (1922) considers 

 these species to be the same, and I am inclined to agree with her. 

 Unfortunately, I have not been able to examine material from 

 any of the hosts from which these two species were obtained, but 

 from the brief descriptions and figures given by von Linstow and 

 Stossich it appears probable that they are identical. 



Ph. antarctica, because of the nature of its labial teeth and 

 mode of origin of the four uteri, is closely related to Ph. abbre- 

 viata, Ph. varani, and Ph. pallaryi ; it is, however, very easily 

 distinguished from all these by the configuration of its male 

 bursa and by the difference in size and shape of the spicules. 

 I have given aii extract of both von Linstow's and Stossich' s 

 descriptions in Part II. 



(26) Physaloptera colubri (Rud., 1819), Diesing, 1851. 

 (Text-fig. 38.) 



The tj^pes of this species, deposited in the Vienna Museum, 

 consisted of two immature females and the fragments of another 

 worm ; the specimens were slightly shrunken. 



