OBSERVATIONS ON TWO NEW PARASITIC TREMATODE 
WORMS: HOMALOGASTER PHILIPPINENSIS, 
AGAMODISTOMUM NANUS. 
By Ch. Wardell Steles, Ph. D., 
Chief of Division of Zoology, 
and 
Joseph Goldberger, 
Passed Assistant Surgeon, Hygienic Laltoratory, U. S. Public Health and 
Marin e-H osp ital Se?'v ice. 
Among the parasites recently sent to us for identification are two 
interesting trematodes which appear to be new species. One of them 
(Homalogaster philippinensis) is an amphistome from the Philip- 
pines, the other {Agamodistomum nanus) a distome from Africa. 
G-eiiTis ECOnyLAJLOG-A^STEI?, I>oiriei-, 1SS3. 
1883: Homalogaster Poirier, 1883, 74-76, 79 {va. palonise)', oyaXoi, flat; ya6rf}p, 
stomacli ; 1885, 120. For bibliography see Stiles and Hassall, 1908, 
Index Cat., Trematoda, Bull. 37, Hyg. Lab., F. S. P. H. & VI. H. S. 
Generic diagnosis. — Paramphistomidse,? Cladorchinse : o, Body divided into 
a large oval, anteriorly pointed, cephalic portion containing all of the inner or- 
gans, and a caudal portion composed of the large acetabulum. Dorsum con- 
vex. Venter flat or excavate, provided with alternating longitudinal rows of 
large mammalike structures; of these, the papilhR near the middle of the rows 
(both longitudinal and transverse) are larger than those further from the 
middle. Pharynx with two lateral pouches; esophagus present. Genital pore 
ventromedian, cephalad of testicles. Testicles in anterior half of body; ovary 
near acetabulum ; vitellaria rather well developed, lateral of ceca, extending 
about from esophageal bifurcation to ovary. Egg with operculum. 
Habitat : Large intestine of ruminants. 
Type species. — Homalogaster palonise Poirier, 1883. 
Comparatively little work has been done on this genus. In fact. 
Fischoeder was obliged to leave open certain questions in regard to 
the generic characters. AVith the new form here described, the genus 
contains three species. An effort to obtain the two known species for 
° In a later paper we shall have occasion to discuss the subfamily position of 
this genus. 
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