BY VERA IRWIN-SMITH. 421 



erect, broad, conical, with blunt tip, which in this specimen appears to be 

 fractured; no internal tooth at its base, paired teeth at sides large, denticular 

 border composed of a single row of very minute denticles, scarcely visible even 

 under high magnifications, sides of lips too damaged to show details of lateral 

 marginal denticles (Text-tigs. 10, 11). Post-cervical papillae just behind junc- 

 tion of muscular and glandular oesophagi. Oesophagus very long and thick, 

 muscular oesophagus narrower than glandular oesophagus, and less than one- 

 eleventh of the total length, base of glandular oesophagus broad and rounded, its 

 valves inserted to some dei^th into the lumen of intestine (Text-fig. 12). Vulva 

 behind termination of oesophagus; vestibule, reservoir, and common trunk all 

 long, division into four branches evidently dichotomous, but the second bifurca- 

 tion only shows on one side, the other being torn away (Text-fig. 14). Uteri 

 large and distended, with thin, delicate, transparent walls showing elongated 

 cellular structure well. Position of reeeptacula seminis and ovaries in body not 

 determined. Oviducts sharply delimited from reeeptacula seminis (Text-fig. 15).. 

 Eggs smaller than in the other species, the shell relatively thin, brown coloured 

 (Text-fig. 16). Posterior end of the body thick and blunt, the tail very short, 

 but too distorted for accurate measurement (Text-fig. 13). 



Measurements. — Total length, 24 mm. ( ?) ; maximum diameter, 1.36 mm.; 

 diameter at base of collarette, 400 /x ; at anus, 560 ^. Tail, 400 /j. long. Distance 

 from cephalic extremity of post-cervical papillae, 592 jx ; excretory pore, 688 fx, ; 

 most anterior loop of uterus 576 fi (?). Distance from posterior extremity of 

 most posterior loop' of uterus, 160 /x (?). Maximum width of uterus, 480 ju; 

 width at junction with receptaculum seminis, 112 fj. ; width of oviduct at junc- 

 tion, 64 /J.. Receptaculum seminis, 432 x 192 ^u,. Vestibule, 1.68 mm. x 96 /j.; 

 reservoir, 1.44 mm. x 192 jj, ; common trunk, 1.52 mm. x 85 jj.. Distance between 

 first and second bifurcation, 400 /x- Lengfhs of oviducts, 1.87 and 1.52 mm. 

 Muscular oesophagus, 480 x 176 fj., total length of oesophagus, 5.56 mm. ; width 

 at its base, 480 ^. Proportion of total body-lenglh to that of oesophagus, 4.3 

 (?). Eggs, 44x29^. 



Host. — Varanus varius. Location. — Stomach. Locality. — Bumberry, near 

 Manildra, N.S.W. 



Collected by Dr. J. B. Cleland, 8/1/16. 



The dimensions of the eggs agree with the figures given by Parona for P. 

 varani, but differ from those given by Seurat for the same species. Parona's 

 description is insufficient otherwise, for comparison, but P. clelandi differs from 

 the specimens described by Seurat as P. varani, in the much greater length of 

 the oesophagus and common trunk, the dichotomous instead of direct division of 

 the latter, and the shorter ovijector and tail. 



In addition to the host from which this and the preceding specimens were 

 taken, two other examples of Varanus varius were searched by Dr. Cleland for 

 internal parasites. Neither of them contained Physaloptera. In one, taken at 

 Dubbo, October, 1911, the only helminth present was a cestode in the intestines. 

 The other taken at Eidsvold, Queensland, September, 1912, contained only some 

 examples of a Filaria sp. in the pleuroperitoneal cavity. 



Physaloptera sp., from Lialis bwrtonii Gray. 



The material available is inadequate for specific determination, consisting of 

 two small larvae, 6.6 and 6.7 mm. long, in which the genital system is not 

 developed. 



The body is relatively stout (Text-fig. 20) ; cephalic collarette and lateral 

 alae fairly well developed. Cuticle fairly thick, fuiely striate transversely. Ex- 



