464 
PACIFIC SCIENCE, Vol. XIX, October 1965 
N eoallolepidapedon n. gen. 
GENERIC DIAGNOSIS: Lepocreadiidae, Lepo- 
creadiinae Odhner, 1905. Body elongate, fusi- 
form, more or less crenulated laterally in hind- 
body, covered with spines. Oral sucker ventro- 
terminal; prepharynx long, esophagus short, 
ceca opening outside, one on each side of ex- 
cretory pore. Acetabulum comparatively small, 
at or near posterior end of anterior third of 
body. Testes lobate, median, tandem, in poste- 
rior half of body. Seminal vesicle tubular, wind- 
ing, extending back of acetabulum to variable 
extent, with its distal portion surrounded by 
prostate cells, the ducts of which penetrate the 
posterior end of the cirrus pouch and empty 
into the pars prostatica. Cirrus pouch thin- 
walled, extending between acetabulum and gen- 
ital pore, containing vesicula seminalis interna, 
well developed pars prostatica and stout cirrus. 
Genital pore marginal or submarginal, at a pre- 
acetabular level. Ovary pretesticular. Receptac- 
ulum seminis and Laurer’s canal present. Uterus 
coiled between ovary and acetabulum. Metra- 
term differentiated. Eggs oval, numerous, mod- 
erately large. Vitelline follicles comparatively 
small, extending along ceca for their greater 
part. Excretory vesicle Y-shaped in fundamen- 
tal pattern, but strongly diverticulate through- 
out its length, reticulate between ovary and 
acetabulum, with terminal pore, not forming 
cloaca. Gastro-intestinal parasites of marine 
teleosts. 
TYPE SPECIES: N. hawaiiense n. sp., in Fistu- 
laria petimba; Hawaii. 
3. Pseudacaenodera crist at a n. gen., n. sp. 
Fig. 3 A-B 
HABITAT: Small intestine of Conger margina- 
tus; Hawaii. 
holotype: U. S. Nat. Mus. Helm. Coll., S.Y. 
No. 21. 
DESCRIPTION ( based on six whole mounts ) : 
Body slender, tapering anteriorly and narrowed 
in region of prepharynx, 2 .4-4. 5 X 0.3-0.42 
mm; a little swollen immediately behind oral 
sucker; the neck region from this swelling down 
to the acetabular zone is provided on each lat- 
eral margin and on the ventromedian field with 
irregular longitudinal rows of sharp-edged dis- 
coid cuticular projections, which are most prom- 
inent in the postoral zone and gradually dimin- 
ish posteriorly. Numerous strong parenchyma- 
tous muscles are attached to the base of each 
projection in this postoral area and fill the 
whole space between the body wall and the 
prepharynx, so that this portion probably func- 
tions as a powerful accessory attachment ap- 
paratus. Oral sucker terminal, bowl-shaped, with 
wide aperture, 50-63 X 78-110 /x. Prepharynx 
0.23-0.35 mm long, considerably enlarged just 
in front of pharynx, with a compact or dissoci- 
ated eye spot on each side at about its middle. 
Pharynx barrel-shaped, 60-100 X 76-110 /x, 
with wide lumen. Esophagus wide, about 80- 
100 /x long, bifurcating near middle of fore- 
body. Ceca also wide in forebody; esophagus 
and anterior portion of ceca surrounded dor- 
sally and ventrally by numerous gland cells 
which are irregular in shape and contain cyto- 
plasmic granules, probably representing residue 
of the accessory digestive metacercarial glands. 
Both ceca opening independently at posterior 
extremity, one on each side of excretory pore. 
Acetabulum 0.18-0.24 X 0.17-0.25 mm, situ- 
ated at posterior part of anterior third of body. 
Testes elliptical, tandem, in posterior third 
of body, separated one from the other by vitel- 
laria; anterior testis 0.22-0.42 X 0.16-0.23 
mm, posterior testis 0.28-0.51 X 0.14-0.22 
mm. Cirrus pouch elongated claviform, 0.34- 
0.5 X 0.04-0.1 mm, almost entirely occupied 
by seminal vesicle, not containing prostatic cells, 
in contrast with that of Acaenodera placopbora 
Manter and Pritchard, I960. No vesicula sem- 
inalis externa. The attenuated anterior portion 
of the seminal vesicle appears to join the metra- 
term dorsal to the acetabulum. Genital sinus 
tubular, opening midventrally on anterior bor- 
der of acetabulum. 
Ovary round, 0.09-0.16 mm in diameter, sit- 
uated medianly a little anterior to fore testis, 
from which it is separated by the vitellaria. 
Laurers canal opening almost middorsally be- 
tween ovary and anterior testis. No seminal 
receptacle. Uterus winding in median field be- 
tween ovary and acetabulum; eggs oval, mod- 
erately large, 75-80 X 52-58 g in life. Vitel- 
laria extending uniformly in lateral fields 
around intestine from level of seminal vesicle 
to posterior extremity; vitelline reservoir com- 
