H. Kobayashi 385 
the latter commonly of 3 lobes. Egg 0*045-0-055 mm. x 0*03 mm. Parasitic 
in the pancreas of Bos taurus. 
E. coelomaticum (Giard and Billet). Body leaf-like, 10 mm. in length by 
4-6 mm. in width, anterior end ordinarily tapering more sharply than in 
E. pancreaticum. Oral sucker 1 *3—1*5 mm. in diameter; ventral sucker 1*2- 
1*4 mm.; ventral sucker situated at the anterior third of the body. Testes 
and ovary usually indistinctly lobulated. Egg 0*045-0*05 x 0*03 mm. para¬ 
sitic in the pancreas of Bos taurus. 
(Several forms were found in association with E. pancreaticum', they are 
distinguished from both the above-described species by their greater trans- 
lucency and the slender uterus containing fewer eggs. Their real nature 
remains unknown.) 
(4) Eurytrema satoi n. sp. 1 (PL XXIV, fig. 4). 
Diagnosis. Body flat, elliptical, 6-6*5 mm. x 2-3 mm., extremities taper¬ 
ing, posteriorly a tongue-like part is somewhat clearly marked. Oral and 
ventral suckers about equal in size; ventral sucker situated at the level of the 
anterior two-fifths. Intestinal caeca extend almost to the posterior end of 
the body. Testes adjacent to the postero-lateral margin of the ventral sucker. 
Testes entire, more or less symmetrically disposed. Ovary situated about the 
middle of the body. Vitellaria small, each consisting of groups of three to four 
ascini, extending posteriorly from the level of the ovary. Uterus with numerous 
loops. Egg small, 0*025-0*03 mm. x 0*018 mm. with thick shell and flat lid. 
Habitat: the pancreas of Macacus cynomolgus. 
Description. This species infests the pancreatic duct of Macacus cyno- 
molgus. The specimens were collected by J. Sato in 1914. Several mature 
and immature specimens were obtained from a single host. 
The body is dorso-ventrally flattened, giving a leaf-like appearance. The 
form is elongate ovoid or ellipsoid, the greatest width being reached at the 
posterior third of the body-length. The length is 6-6*5 mm. and the broadest 
part measures 2 -3 mm. in a mature specimen. The lateral margins are 
gradually convergent anteriorly, while posteriorly they narrow abruptly and 
at the posterior end a tongue-like appendage is formed. In some cases the 
broadest part lies at the middle of the body and then the body narrows 
anteriorly and posteriorly in a like manner, though there is a tongue-like 
appendage, more or less well defined. 
The cuticle is smooth. The oral sucker lies near the anterior end. its 
diameter is 0*5 mm.-0*55 mm. The ventral sucker lies in the anterior half of 
the body, and its size is equal, or slightly larger than that of the oral sucker, 
the diameter being 0*55-0*6 mm. 
1 Since this description was written, I have read the paper by A. Raillict, A. Henry et 
C. Joyeux (1912), Sur deux TTematodes des Primates, Bull. Soc. Path. exot. v. My species 
resembles Eurytrema hrumpti , as described by these authors, but differs from the latter in the 
smaller number of its vitelline glands and in the weaker development of the uterus. 
