BY VERA lEWIN-SMITH. 417 



anterior end in immature whole females, 4.68 mm. behind junction of oesophagus 

 and intestine in broken specimens; vestibule and reservoir of nearly equal 

 length, common trunk slightly shorter, dichotomously divided into four branches, 

 distance between first and second bifurcations 128 to 240 ^u. ; the whole system 

 extending straight back, the division into the four trunks occun-ing nearly or 

 quite at the maximum length from the vulva, and the uteri not curving forward 

 beyond the level of the reservoir (Text-fig. 7). Reservoir sharply distinct from 

 common trunk. The four branches continuous at a distance of 400 /^ with the 

 four uteri, which lie dorsally and ventrally, not intricately coiled, the last coils 

 some distance in front of anus; the four receptacula seminis, behind them, dark 

 brownish bodies, showing distinctly through the body wall, merging gradually 

 into the uteri but sharply constricted from oviducts ; ovaries much coiled in re- 

 gion between these and anus. Uteri in unfertilised females poorly developed, 

 slender, 128 fi wide, no formed eggs, terminal portions of system almost entirely 

 devoid of contents ; uteri in mature females filling body cavity, 208 ^ wide, 

 crowded witli eggs containing well developed embryos. 



Of the two mature females, in both of which the anterior end is missing, 

 the remaining portion in one extends just to the base of the oesophagus, and is 

 21.6 mm. long, so that the estimated total length is about 25 mm. In the other, 

 the body is broken off across the middle of the reservoir, and the length of body 

 remaining is 14.16 mm. The eggs are large, and elongated oval in form, 

 measuring 57 x 28 fx (Text-fig. 9). 



Larvae (Text-figs. 17-19) 4.2 to 7 mm. long, slender, delicate, semitrans- 

 parent; tail relatively long, 1/24 to 1/30 of body-length, tapering to a rounded 

 point, generally ventrally inflected at tip. Only two of the six specimens (one 

 5 mm. and one 7 mm. long) showing rudiments of genitalia; position of vulva 

 not determined, portions of system visible being the rudiments of common trunk, 

 first and second branching, and beginning of uteri, without lumen. 



Male. Caudal bursa much like that of P. antarctica in shape and arrange- 

 ment of cuticular processes (Text-fig. 5). The caudal papillae stalked and with 

 corona, but spaced at more equal distances apart than in P. antarctica; the first 

 from tip of tail usually nearer to the extremity, and the other two further apart, 

 though the positions vary. The distance of the first from tip varies from 192 

 to 304^, and the distance between second and third from 96 to 208 fx. Cloacal 

 aperture very large and circular, with a prominent rim. Spicules very unequal 

 in length, left slender, reaching from cloaca almost or quite to junction of ductus 

 ejaculatorius and vesicula seminalis, 4.7 to 5.9 times as long as right, which is 

 broader (Text-fig. 6). Ductus ejaculatorius about same length as in P. antarc- 

 tica, 1.14 to 1.44 mm., vesicula seminalis 2.7 to 4.8 mm., vas deferens, separated 

 from it by a distinct constriction, running straight forward to within 2.4 to 3.6 

 mm. of base of oesophagus before turning back. 



The longest remaining portion of a broken male specimen is 17.84 mm., 

 which includes 1.28 mm. of the basal part of the glandular oesophagus. The 

 estimated total length of this specimen is therefore about 19 mm. 



Host. — Gymnodactyliis platurus Shaw. 



Location. — Stomach. 



Locality. — Narrabeen, Sydney. 



Type specimens in the Australian Museum, Sydney. 



The notes made by Mr. Mackerras show that of eight or ten specimens of 

 this gecko examined by Miss Bancroft and himself, five harboured nematodes in 

 the gastro-intestinal tract. Two of these were the hosts for the specimens 

 described above. The otlier three were taken at Mosman, Sydney, in September, 



