w. Nicoll 
343 
ventral sucker and winds back between the testes for a short distance, 
but only comparatively few ova are found behind the ventral sucker. 
The ova measure 0'036-0'043 mm. in length, and 0’021-0 - 024 mm. in 
breadth, the average being 0 039 x 0'022 mm. 
This trematode bears a close resemblance to the species described 
by MacAlpine (1891) from the tiger snake ( Hoplocephalus superbus), 
specimens of which I owe to the courtesy of Dr Sweet of Melbourne. 
MacAlpine’s species, however, is considerably larger and has a much 
longer cirrus-pouch. It may be included in the same genus and for it 
I propose the name Dolichopera macalpini. 
* The chief characteristics of the new genus Dolichopera may be 
summed up as follows :— Lepodermatidae of small to moderate size, 
elongated and somewhat flat. Cuticle covered with spines. Ventral 
sucker smaller than oral sucker and situated behind the middle of the 
body. Oesophagus short and diverticula extending to near posterior 
end of body. Genital aperture between the oral sucker and the margin 
of the body, on the right or left side. Cirrus-pouch sinuous and elon¬ 
gated. Ovary behind the right posterior quadrant of the ventral sucker. 
Testes behind the ovary near the posterior end of the body, longitudin¬ 
ally oval and somewhat asymmetrical, the left testis being in advance. 
Yolk glands entirely lateral in the posterior part of the body. Uterus 
very voluminous, filling up the v^hole of the middle of the body, and 
passing between the testes only for a very short distance. Ova 0*03- 
0*04 mm. in length and about 0*02 mm. in breadth. 
Type. D. parvula Nicoll. 
Habitat. Intestine and lungs (?) of snakes (Australia). 
Genus Aptorchis n. g. 
Aptorehis aequalis n. sp. 
(Plate XXIV, fig. 7.) 
Only a single specimen of this form was obtained from the intestine 
of a turtle ( Emydura latisternum). It is a small fiat species the 
posterior part of which is broad and rounded. The width diminishes 
gradually towards the anterior end which is pointed. The cuticle is 
beset with moderately large spines. 
The length is 2T mm. and the greatest breadth 0 - 85 mm. The 
oral sucker is globular, with a diameter of 0'21 mm. The ventral 
sucker measures 0*31 mm. and is situated 0*82 mm. from the anterior 
end of the body. 
