G5 
very thin winding tube, giving off a Laurer's canal and receiving 
the vitellarian duct and shell gland, and then runs forward as the 
uterus straight to a dilated portion full of eggs opening anteriorly 
by the side of the male opening. The oviduct and vitellarian duct 
are easily seen in the living state. The eggs are small, 0-30 mm. 
bug, with a short process at each end. The vitellaria are brownish 
and very abundant, giving off transverse ducts just anterior to the 
ovary. 
EXPLANATION OF PLATES. 
The following letters apply to all the figures :-O.S., oral sucker; A.S., 
anterior sucker; E., rostellum; V.S., ventral sucker; P.PH., prepharynx '; 
P., pharynx; (ES., oesophagus; I., intestine; E., excretory system; E.P 
excretory pore; T., testis; V.D., vas deferens; V.SEM., vesicula semiaalia; 
P.P., pars prostatic; C.S., cirrus sac; C, cirrus; G.P., genital pore; 
0., ovary; O.D., oviduct; B.S., receptaculum seminis; L.C., Lamer canal; 
S.G., shell gland; V. ( vitellaria; V.K., vitellarian receptacle; V.D., vitellarian 
duct; E.G., eggs; U., uterus; V.G., vagina ; M., miracidium ; P. A., posterior 
appendage. 
Plate I. 
Fig. l.-Gasterostomum, gracilescens (liud.) Length 6 mm. Adult, ventral 
view. From intestine of Lophius piscatorius. 
„ 2.-G. gracilescens. Length 2-0 mm. Larval form pressed out of cyst 
From nerves of Gadtts u-glefintts. 
,, 3. -G. gracilescens. Cyst with worm inside. 
" ^''^^Sr'^JTT^ 90 '^- Lcn e lh Adult, ventral 
% ie\v . F rom pyloric cceca of Cottus scorpius. 
„ S.-Prosorhynchusnrandu, n. Bp. Length 2-8 mm. Adult, ventral view 
From pyloric ca>ca of Gadus merlangus. 
" V, -- Ste ^P h0 " u \f''rci^r (Ols.) Length 3 mm. Adult, ventral view 
I rom intestine of Pleuronectes limanda. 
„ 7. -Ovary and connected female organs of S. furciger. 
" 8, ~ P ° rf Sn in?'7°" Length M mm - Adult - central view. 
1< rom intestine of Pleuronectes platessa. 
Plate II. 
'■-^^^^^n? Length 3-2 mm. Adult, ventral view, 
x rom intestine of Scomber scombrus. 
2.-Lcpodora rachhea (Cobb.) Length 3-5 mm. Adult, ventral view 
Iroin intestine of Gadus <cgh,inus. 
3-Ovary and connected female organs of L rachnca. Dorsal view. 
'io. 
