Digenetic Trematodes, I — YAMAGUTI 
461 
mm, lined with closely packed, columnal struc- 
tures and provided with a thin layer of circular 
muscle fibers, with a very narrow axial lumen 
which opens at the tip of the conical end of 
the cirrus. No prostatic complex. Cirrus pouch 
saccular, 0.14-0.42 X 0.08-0.3 mm, with thin 
wall of mainly circular muscle fibers, almost 
completely occupied by cirrus and ejaculatory 
duct. Genital atrium not well developed, open- 
ing on left margin of body at level of posterior 
border of acetabulum. 
Ovary oval, 0.17-0.33 X 0.12-0.26 mm, sit- 
uated in median line or a little out of it at 
junction of middle with posterior third of body, 
separated from anterior testis by vitellaria. Re- 
ceptaculum seminis retort-shaped, 0.14-0.2 X 
0.04-0.11 mm, overlapping ovary on its dorso- 
lateral side. The germiduct arising from the an- 
terior end or anterodorsal part of the ovary 
winds its way backwards or laterad and joins 
the seminal receptacle at its anterior end where 
the Laurer’s canal is given off; then it unites 
with the vitelline duct to lead into the uterine 
duct. Laurer’s canal winding, opening dorso- 
lateral to ovary. Uterus winding forward from 
in front of ovary alongside vas deferens; metra- 
term crossing cirrus pouch dorsally and opening 
into genital atrium immediately anterior to 
conical tip of cirrus; eggs elliptical, thick- 
shelled, 46-65 X 25-37 /*. Vitelline follicles 
comparatively large, extending from posterior 
end of seminal vesicle to posterior extremity, 
confluent in median field between ovary and 
anterior testis as well as in posttesticular area; 
vitelline reservoir dorsal or lateral to ovary. Ex- 
cretory vesicle tubular, middorsal, reaching as 
far forward as intestinal bifurcation; excretory 
pore terminal, forming cloaca. 
DISCUSSION: This genus is characterized by 
the structure of the male terminal genitalia, the 
possession of a cloaca and an extremely long 
tubular seminal vesicle. Though resembling 
lepocreadiids in general anatomy, especially in 
the ovarian complex, extent of the vitellaria, 
and excretory vesicle, it differs from any of the 
known genera in the cirrus being developed as 
a massive organ and occupying almost the en- 
tire cirrus pouch and opening on the postace- 
tabular margin of the body. The fact that the 
seminal vesicle develops outside the cirrus 
pouch in the form of an extremely long wind- 
ing tubule is also one of the important differen- 
tial characters. I prefer to propose a new sub- 
family Bulbocirrinae, placing it near the sub- 
family Lepocreadiinae. 
Bulbocirrinae n. subf. 
SUBFAMILY DIAGNOSIS: Lapocreadiidae. Body 
slender, spinose. Oral sucker small, prepharynx 
long. Cloaca present. Acetabulum in anterior 
third of body. Testes tandem, in posterior part 
of body. Seminal vesicle tubular, very long, fol- 
lowed by muscular ejaculatory duct which is 
enclosed in cirrus pouch. Cirrus massive, enor- 
mous, occupying almost entire cirrus pouch. No 
internal seminal vesicle. Genital pore marginal, 
postacetabular. Ovary pretesticular. Uterus wind- 
ing between ovary and cirrus pouch. Vitellaria 
posterior, not very extensive. Excretory vesicle 
tubular. 
Bulbocirrus n. gen. 
GENERIC DIAGNOSIS: Lepocreadiidae, Bulbo- 
cirrinae. Body tapering anteriorly, with maxi- 
mum width in caudal third. Oral sucker small, 
ventroterminal; prepharynx very long; pharynx 
cylindrical; ceca opening into cloaca at poste- 
rior extremity. Acetabulum comparatively small. 
Testes directly tandem, posterior. Seminal vesi- 
cle very long, winding. No prostatic complex; 
ejaculatory duct muscular; cirrus massive, bulb- 
ous, occupying cirrus pouch together with ejac- 
ulatory duct. Genital atrium not well developed; 
common genital pore marginal, postacetabular. 
Ovary separated from anterior testis by vitel- 
laria; receptaculum seminis and Laurer’s canal 
present. Uterus long, winding; eggs thick- 
shelled. Vitellaria in posterior half of body. Ex- 
cretory vesicle tubular, reaching to near intes- 
tinal bifurcation. Intestinal parasites of marine 
teleosts. 
TYPE SPECIES: B. aulostomi n. sp., in Aulos- 
tomus chinensis; Hawaii. 
2. Neoallolepidapedon haw aliens e 
n. gen., n. sp. 
Fig. 7 A-B 
HABITAT: Stomach and intestine of Fistularia 
petimba; Hawaii. 
