1060 , MR. R, J. ORTLEPP ON THE 



examined by me the two teeth were of the same size and fairly- 

 large. 



The number of uteri and their mode of origin brings the 

 species into the group characterised hj P. abbi'eviata. It differs, 

 however, from all the reptilian tetradelphoid forms by the 

 shape of its outer tooth and by the presence of a large and 

 tripartite inner tooth ; this latter tooth is either absent — 

 Ph. colubri — or represented only by a small spike-like tooth 

 at the base of the outer tooth — P. paradooca — in the reptilian 

 forms. 



The natvire of the teeth and the presence of four uteri ally this 

 species to Ph. tumiefaciens Henry & Blanc, 1912, from which 

 species it differs, however, by the difi'erent arrangement of its 

 bursal papillse, no reduplication of the cuticle over its tail, mode 

 of origin of its uteri, and the presence of a common trunk 

 portion in its unpaired female genitalia. 



(22) Physaloptera quadrovaria Leiper, 1908. (Text-fig. 32.) 



The types of this species, which were kindly placed at my 

 disposal for study by Professor Leiper, consisted of six mature 

 fem.ales and one male ; the latter unfortunately had most of its 

 bursal region broken off. 



The parasites are stout, being thickest just behind their 

 middle and attenuated towards both extremities. The cuticle 

 shows a fine transverse striation, and is partly reflected over 

 the lips. 



The two cervical papillae are situated laterally some distance 

 behind the junction of the two oesophageal parts. In the male 

 they are 550 ^ from the anterior end, and in the females 

 slightly more than 600 /x,. The excretory duct opens ventrally 

 at the same level or just behind the level of the cervical 

 papillfe. 



The lips are large and somewhat flattened in lateral view ; 

 each carries a large wedge-shaped external tooth with its tip 

 slightly bent outwards, and two much smaller lateral teeth 

 slightly split. Between the median and lateral teeth, on the 

 inner face of the lip, there is a row of very small denticles. 

 Internal to and attached to the base of the external tooth there 

 is a small and spike-like internal tooth. 



The oesophagus is relatively short, forming in the male l/7tli 

 and in the female about l/9th of the total body-length ; it is 

 straight, slightly thickening posteriorly, and its anterior end is 

 differentiated into a short and narrow muscular part, about 350/a 

 long in both sexes, and having the nerve ring in its posterior 

 quarter. 



Female. 



The specimens vary in length from 28 to 32 mm., with a 

 breadth of "95 to I'l mm. The tail is relatively long and 



