140 DR. W: NICOLL ON TREMATODE 
to thank the courtesy of the Secretary and the officials at the 
Prosectorium. The animals were almost exclusively birds and 
reptiles or batrachians; no fishes, and only a few mammals were 
examined, The collection yielded between twenty and thirty 
species, a considerable proportion of which are new. Some of 
these have already been described in previous communications to 
the Society (Nicoll, 1911, 1912, a, 6). 
The reptilian parasites were the most interesting of those 
obtained, as several of them represented new generic types. They 
include forms from the Striped Snake, the Spiny-tailed Mastigure, 
Schott’s Tree-Snake, and Smyth’s Water-Snake. 
Usually there was an interval of twenty-four hours, some- 
times longer, between the death of the animal and the time of 
examination, but in spite of that the parasites in most cases were 
in a good state of preservation. In some instances, however, they 
were so macerated as to be almost useless. As might have been 
expected, parasites were more frequent in those animals which 
had been in the Gardens for the shortest period. Except in the 
few instances reported by Dr. Leiper (1912), there appears to be 
little probability of infection being acquired in the Gardens. In 
most cases the infections were not heavy, there being usually 
only a few worms present. Gross infections, however, were met 
with in the case of some Striped Snakes which were heavily in- 
fected with two larval Trematodes (Nicoll, 1912), and a Marsh 
Harrier which contained a large number of liver-flukes. 
The first form I shall describe is an interesting new species 
from the Striped Snake (Zropidonotus ordinatus). 
Family LEPODERMATID&,. 
1. MeprIorIMA PRopRIA, gen. et sp. n. (PI. I. fig. 1.) 
This species is a typical member of the family Lepodermatide, 
to which a large proportion of reptilian trematodes belong. One 
specimen was obtained from the intestine of a Striped Snake 
(Z-opidonotus ordinatus). 
It is an elongated, slightly flattened Trematode, both ends of 
which are rounded. The cuticle is beset with small spmes, which 
extend throughout the whole length of the body. The length is 
about 6 mm., the greatest breadth, near the middle of the body, is 
1-2 mm. 
The globular oral sucker has a diameter of 5 mm.; the ventral 
sucker, which is somewhat oval, measures ‘7 xX°8 mm., and is 
situated 1-7 mm. from the anterior end. 
There is a very short prepharynx, and a pharynx measuring 
‘2x17 mm. The esophagus is about the same length as the 
pharynx. The intestinal diverticula are short, not extending very 
far (-4 mm.) beyond the ventral sucker. Their ends are obscured 
by the enormous mass cf ova. 
The genital aperture is median and is situated just behind the 
