42 4 
Fig. 3. Lagenivaginopseudobenedenia etelis n. g., 
n. sp. 3 A, Holotype, ventral view; 3B, haptoral an- 
chors of holotype; 3C, terminal genitalia of holotype, 
ventral view. 
Testes elliptical, 0.31-0.5 X 0.2-0.34 mm, 
juxtaposed contiguously at anterior part of mid- 
dle third of body. Rudimentary Goto’s organ 
present. Vas deferens convoluted immediately 
anterosinistral to vitelline reservoir, then wind- 
ing along posterior wall of cirrus pouch, which 
PACIFIC SCIENCE, Vol. XX, October 1966 
it penetrates from the dorsal side; after enter- 
ing the cirrus pouch it pursues a short winding 
course, then a long straight course alongside the 
distal portion of the prostatic duct, with which 
it finally unites to form the ejaculatory duct. 
Cirrus pouch subcylindrical, thin-walled, 0.25- 
0.4 X 0.08-0.1 mm, curved transversely behind 
pharynx, containing at its base a small, tubular, 
prostatic reservoir and cylindrical pars muscu- 
laris of prostatic duct which is 0.1-0.13 mm 
long and provided with a thick coat (30-60p 
wide) of fine circular muscle fibers. Prostatic 
cells distributed around base of cirrus pouch. 
Cirrus elongate conical, pointed, 0.42 X 0.06 
mm in the type; it may or may not project out 
of the genital pore. Common genital pore pos- 
terosinistral to pharynx, a little (0.1 mm in the 
type) away from nearly right angle formed by 
neck and trunk. 
Ovary subglobular to oval, 0.15-0.3 X 0.09- 
0.22 mm, situated medianly, with its posterior 
end intercalated between two testes. Ootype 
spherical, 0.15-0.2 mm in diameter, provided 
with epithelial lining; uterus proper well sepa- 
rated from ootype, 0.2 mm wide in the type, 
opening into common genital pore by a funnel- 
shaped passage. No eggs observed. Vitellaria 
consisting of small follicles, coextensive with 
intestine, wide apart anteriorly, but confluent 
posteriorly; paired longitudinal collecting ducts 
distended with yolk cells; transverse duct may 
be narrower, up to 70p wide in the larger para- 
type, not forming a definite reservoir. Vagina 
lageniform, 0.17 mm wide in the type, muscular 
at its narrow neck, situated between uterus and 
right intestinal limb, opening almost midven- 
trally behind cirrus pouch. Seminal receptacle 
oval, 0.1 X 0.055 mm in the type, between 
vagina and vitelline reservoir. Excretory system 
not made out. 
discussion: This genus, characterized by the 
head and neck being marked off from the trunk 
and by the peculiar structure and position of the 
vagina, bears a certain resemblance to Pseudo - 
benedenia Johnston, 1931, especially in the pro- 
static vesicle being enclosed in the cirrus pouch, 
but it seems justified to separate the genus in 
question from Pseudobenedenia on the basis of 
the above mentioned features. The compound 
generic name refers to the lageniform vagina 
and close relationship to Pseudobenedenia. 
