242 
Treinatodes from Fish 
Lepidauchen n. g. 
Body broad and flat; covered with spines anteriorly. Oral sucker 
much larger than ventral, which lies in front of the middle of body. 
Prepharynx short, pharynx very large, oesophagus absent. Genital 
aperture median, near intestinal bifurcation. Cirrus pouch short and 
stout. Receptaculum seminis absent. Otherwise as m Allocreadiinae 
Type species : L. stenostoma from intestine of Labrus hei'ggylta. 
Hemipera ovocaudata n. g., n. sp. 
(Figs. 4, 5.) 
This peculiar and interesting form was found in the stomach of four 
out of 24 specimens of Lepadogaster gouanii. In all but one case only 
a single immature example was obtained; in the fourth three examples 
occurred, two of which contained eggs. 
The species is small and delicate, elongated and sub-cylindrical in 
shape, with somewhat pointed ends. The largest specimen measured 
1’54 mm. in length with a breadth of 0’56 mm. across the ventral sucker. 
The surface of the body is smooth and has no cuticular spines. 
Both suckers are globular. The oral sucker is subterminal and 
measures 0'22 mm. in diameter. The ventral sucker is much larger, 
measuring 0'4() mm., and is situated at a distance of 0’87 mm. from the 
anterior end of the body, i.e. distinctly behind the middle. 
Contiguous with the oral sucker is a medium sized pharynx having 
a diameter of 0'066 mm. It is followed by a very short oesophagus. 
The diverticula pass out at right angles to the oesophagus but after 
a short distance bend abruptly backwards and run down the sides of the 
body to the posterior end, their ends being very close together. The 
excretory vesicle resembles that of Derogenes and the Hemiuridae. 
The median stem, which is very narrow, divides into two near the 
posterior border of the ventral sucker. The paired limbs pass out 
towards the sides of the body but at the level of the pharynx they turn 
in and unite dorsal to the pharynx. 
The testes are symmetrically situated near the posterior end of the 
body, from which they are separated by a space equal to half their 
length. Each slightly overlaps the corresponding intestinal diver¬ 
ticulum and they are separated from each other by a narrow space 
through which runs the excretory vesicle. They are elongated oval 
bodies, measuring 0'22 x 0T4 mm. Their long axes are slightly oblique. 
The genital aperture lies in the middle line immediately behind 
