1080 MR. R. J. ORTLEPP ON THE 



in position. On the ventral surface there are three pre-anal 

 papillae immediately in front of the anus, and five pairs of post- 

 anal papillae. The 1st and 2nd of these last are found close 

 together near the anus ; the 3rd and 4th are closely approximated 

 to each other, and are inserted in the middle of the tail ; the last 

 pair is situated midway between them and the caudal extremity ; 

 the whole ventral surface of the bursa is covered by longitudinal 

 rows of tubercles. 



The spicules are unequal, that of the left side being over six 

 times as long as that of the right. The right spicule is fairly 

 stout, measuring 57 /x at its base and gi-adually tapering to a 

 point ; it is 420 /a long. The left spicule is also pointed, but much 

 slenderer ; it is 2*7 mm. long by 27 /x broad at its base. 



Host : Xei'us setostos. Stomach. South Africa. 



The types to be deposited in the British Museum of Natural 

 History, London. 



The mode of origin of the uteri, in conjunction with their 

 number, give this species a unique position in the genus. 



The general character of the vagina, egg-chamber, common 

 trunk, and eggs are typical for the genus, so that the presence 

 of numerous uteri is not a sign of very close affinity to the 

 polydelpboid species Ph. turgida and Ph. dilatata. 



(31) Physaloptera sp. (Text-fig. 44.) 



The study of this species is based on a single male 15 mm, long 

 and '65 mm. broad. It was collected from the stomach of a 

 Bandicoot which had died in the Gardens of the Zoological 

 Society of London. 



From the middle forwards the body becomes attenuated, but 

 behind the middle the body is of a uniform thickness. The 

 cuticle is finely striated transversely, and is reflexed over the lips 

 so as to completely enclose them. The cervical papillag axe found 

 457 ij. from the head end, i. e. at the junction of the two oesophageal 

 parts. The excretory pore is situated just behind them. 



The mouth is bounded by two large and somewhat conical lips, 

 each surmounted at its apex by a large and triangular outer tooth 

 and immediately internal to it by a median tiipartite tooth, of 

 the same height as the outer tooth, but less chitinised. Two 

 external papillae are present on each lijj. 



The oesophagus is 3'77 mm. long; its muscular pai-t is thinner 

 and 400 p. long, and the nerve ring encircles it just behind its 

 middle. 



The caudal bursa is twice as long as it is broad, and it forms 

 l/9thof the body-length. Its chief characteristic is the irregular 

 arrangement of its papillse. Of these thei'e are four stalked 

 papillpe on the right side and six on the left. Those of the right 

 side are arranged in a pre-anal group of three, far removed from 

 the anus, and a post-anal papilla ; those of the left side are 

 arranged in a pre-anal group of five and a single post-anal papilla. 

 The three pre-anal ventral papillae are far removed from each 



