Digenetic Trematodes, I — YAMAGUTI 
467 
consisting of two compact oval masses measur- 
ing 37-60 fi by 46-100 g and lying directly 
tandem immediately behind ovary; vitelline 
ducts united near their origin into a common 
duct which runs forward to the ootype situ- 
ated dorsal to the ovary. Uterine coils descend- 
ing to posterior extremity and then ascending, 
occupying all available space of hindbody; met- 
raterm running forward ventral to pars prosta- 
tica and joining hermaphroditic duct at anterior 
end of pars prostatica. Eggs elliptical, 30-38 X 
13-20 ix. Excretory pore terminal; excretory 
vesicle tubular; excretory arms united anteriorly 
dorsal to pharynx or esophagus. 
DISCUSSION: The present genus differs from 
Bunocotyle Odhner, 1928, in several important 
points, shown in Table 1. 
Genolinea ampladena Manter and Pritchard, 
I960, probably may be transferred to Pseudo- 
bunocotyla, although in this species the post- 
acetabular ridge represented by a mere trans- 
verse, ventral, cuticular line is stated by the 
authors to be present in three specimens and 
absent in three other specimens. It agrees com- 
pletely with the present genus in general anat- 
omy, especially in the terminal genitalia. 
Pseudo buno cot y la n. gen. 
GENERIC DIAGNOSIS: Hemiuridae, Bunocotyl- 
inae. 3 Body cylindrical, without tail, with collar- 
like ridge around oral sucker and another 
immediately behind acetabulum. Oral sucker 
large, terminal; pharynx small, esophagus short, 
3 Subfamily diagnosis given in Systema Helmin- 
thum, vol. 1 (p. 267-268) must be emended so as 
to include P seudobunocotyla. 
ceca terminating separately near posterior ex- 
tremity. Acetabulum very large, prominent, an- 
terior. Testes tandem, postacetabular; seminal 
vesicle sigmoid, more or less overlapping ace- 
tabulum; pars prostatica large, surrounded by 
large prostate cells which are well delimited 
from the surrounding parenchyma. Hermaphro- 
ditic duct well differentiated, enclosed in mus- 
cular hermaphroditic pouch. Genital pore im- 
mediately postbifurcal. Ovary well separated 
from posterior testis by uterine coils; recep- 
taculum seminis present. Vitellaria consisting 
of two compact masses situated directly tandem 
immediately behind ovary. Uterine coils reach- 
ing posterior extremity when fully developed. 
Eggs small, elliptical. Excretory vesicle tubular; 
arms united dorsal to pharynx or esophagus. 
Stomach parasites of marine or brackish water 
teleosts. 
TYPE SPECIES: P. aw a n. sp., in Chanos cha- 
nos; Hawaii. 
6. Quadrifoliovarium pritchardi n. gen., n. sp. 
Fig. 2 A-B 
HABITAT: Stomach and pyloric ceca of Naso 
unicornis (local name "kala”); Hawaii. 
HOLOTYPE: U. S. Nat. Mus. Helm. Coll., S.Y. 
No. 24. 
DESCRIPTION (based on 17 whole mounts): 
Body elongate, cylindrical, smooth, 3.0-9.0 mm 
long by 0.2-0.6 mm wide, tapered at each ex- 
treme end. Mouth opening ventrosubterminally. 
Oral sucker 0.11-0.28 X 0.15-0.29 mm, sur- 
mounted by rounded conical preoral lobe 40- 
90 fx thick, directly followed by well-developed 
pharynx 0.06-0.15 mm long by 0.08-0.15 mm 
wide; esophagus 80-220 /x long, provided with 
well-developed longitudinal muscle fibers. Ceca 
TABLE 1 
Differentiating Characteristics of Bunocotyle and P seudobunocotyla 
Character 
Bunocotyle 
P seudobunocotyla 
Ceca 
united posteriorly 
terminating separately 
Prostatic complex 
poorly developed or lacking 
very strongly developed 
Vitellaria 
single 
double, tandem 
Receptaculum seminis 
absent (?) 
present 
