The Philippine journal of science. [Vol. 57, no. 1]

264

The Philippine Journal of Science

1935

is how these infestations (which judging from the ease with
which we encountered them at autopsy seem quite common, at
least among our raw-fish-eating population) escaped detection
during the last thirty years of active routine faecal examination
in private and Government laboratories, considering the fact
that their eggs are larger and even more conspicuous than the
cysts of Entamceba histolytica and other intestinal Protozoa.
To determine the species of fish that serve as the secondary intermediate hosts of these flukes, feeding experiments, involving
puppies and kittens divided into lots each of which is fed from
time to time with a species of fish commonly sold in Manila
markets, are now in progress.
SUMMARY
Six species of heterophyid trematodes hitherto unknown in the
Philippines are reported in this paper. Of these six species,
three have never been described before; namely, Heterophyes
expectans sp. nov. and Stictodora manilensis sp. nov. from
the small intestines of dogs, and Heterophyes brevicaca sp. nov.,
from the small intestine of a native Filipino. Of the remaining
three species, two that were recovered from the small intestine
of man and dog cannot be distinguished from Monorchotrema
taichui Nishigori, 1924, and Diorchitremcu pseudocirrata Witenberg, 1929, respectively; while the last, which is identical with
Monorchotrema taihokui Nishigori, 1924, was obtained from man.
This is the first time that these last three flukes are reported
in man as natural infestations. A critical note on Witenberg's
(1929) table of homologous rows, which is intended to show the
parallelism in the development of the features in the different
subfamilies of Heterophyidme, is included.
ACKNOWLEDGMENT
We gratefully acknowledge our indebtedness to the Departments of Pharmacology and Physiology and Biochemistry for
their courtesy in turning over to us for this investigation the
bodies of their used dogs, to the Department of Pathology and
Bacteriology for permitting us to obtain material from their
autopsies, and to Dr. Walfrido de Leon, head of the Department
of Sanitary Bacteriology and Immunology, for the microphotography.