32 
Odhner distinguishes the genus P^oAynclm from 
toZ by the anterior "rostollum," which is not 
and has a sort of beak on its lower margin, the ntetaa forming 
a bow-shaped mass in the anterior part of the body, and the male 
organs also differing in several — — pom* 
P. sauamflius measures 1—1-5 mm. m leugi , 
pear-shaped. The rostellum is 0-12 mm broad and 0 09 m- 
long The body is armed all over with spines. The moutn 
nlr (0-10 mi across) opens almost centrally, in my specimen 
slightly posterior to the centre, the intestine lying in the fore part 
of the body. The excretory vesicle is long and narrow, reaching 
the £S of the pharynx' and opening at the posterior end of 
the bodv The testes are placed obliquely, one behind the other, 
foremost testis on the rightnear the mouth. A thin vas ^de eren 
is given off from each, which join the vesicnla semmal.s without 
unfting. Part of the long-looped vesicnla —lis he ^ outs d 
the cimis sac, and part (the looped part) within The circus sao 
is long and narrow, and lies at the posterior end of the body , in 
its upper part is the loop of the vesicula 
is the pars prostatic* forming a canal somewhat inflated in the 
Z die into which open the prostate cells. The £>™<*% 
into the genital sinus, which opens posteriorly in the genital pore. 
The remainder of the cirrus sac is made up of large .gland eU 9 
The ovary lies to the right in front of the foremost te ^ givrng 
off a short, somewhat swollen oviduct ; there is a small Laurer » 
1 h and the oviduct then receives the vitellarian duct an d U 
gland and passes into the long winding uterus the 1 op s of ^ wh eh 
wander in and out in the posterior two-thirds of the body ana 
finally run down straight to open into the genital -mas by to 
side of the male duct. The eggs are very numerous, £0*1-006 
mm. long, and pale yellow. Vitellaria anterior reaching behind 
on each side to the height of the ovary not so far as th e m i ddta 
of the body. The duct from each side loops round and joins its 
fellow in a reservoir from which a single duct goes to the oviduc . 
The life history of this species is not accurately Known, bu i 
seems very probable that the curious Bucephalus (B. cm) found 
by L vinsen* in ModioUria divers in Greenland is the young stag 
o P. status. Odbner regards it as likely, as this is th 
member of the genus known in the totic^Jio—^ 
• Le,i„«». G. M. 11, - maw « K»4*» « Tm-lodto" over. K. 
t>. v. D. Selsk. Fork. (188D, page SO- 
