144 
animal but extend about two-thirds of the distance from the anterior 
end of the intestinal trunks to 
the genital pore. They are not 
near the surface of the body but 
are scattered irregularly through 
the parenchyma. I was unable to 
find the ducts which Jäger- 
skiöld describes in G. lacteum. 
The median excretory vesicle 
differs from that in G. lacteum 
in that it does not wind between 
the testes but extends forward 
© 
LD) only to a point posterior to them 
Gol} Hf p p 
SZ) | (fig. 1,14). 
UM 
in 
Z| 
1 E The genital pore (fig. 1, 5) 
lies in the middle of the ventral 
surface at the posterior border of 
the broad, anterior portion of the 
body, and opens into a genital si- 
nus of very complicated structure, 
which is similar in all essential 
respects to that in G. lactewm. 
The most conspicuous organ 
(fig. 2, 1) in this complex isa large, 
ellipsoidal muscular structure 
which Jägerskiöld calls the 
spheroidal body. The size and 
shape of thisorgan vary somewhat 
with the condition of contraction 
of the muscles in it, but in the 
specimen represented in the fi- 
gure it has a length of 0,13 mm 
and a thickness of 0,11 mm. It 
lies in the parenchyma dorsal to 
the genital pore, extending some- 
what posteriorly and a little to 
Fig.1. Galactosomum cochleariforme; ventral 
aspect. 1) Oral sucker; 2) Pharynx; 3)Intes- the right, and is surrounded by 
tine; 4) Single-celled glands; 5) Genital : 
pore; 6, Spheroidal body; 7) Vesiculasemi- "UMerous subcuticular cells and 
nalis (thick-walled portion);8)Vesiculasemi- muscle-fibres. Its outer wall is 
nalis (thin-walled portion) ;9° Ovary; 10) Re- 
ceptaculum seminis; 11) Uterus; 12) Yolk made ur of two well-defined mus- 
glands; 13) Testis; 14) Excretory vesicle. cle-layers, the outer of which is 
composed of fibres which have a general transverse direction (fig. 2, 6), and 
