W. H. LeiCtII-Siiarpe 
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perform the function of a copulatory organ. This is heart-shaped and 
includes the whole of the ductus ejaculatorii, which open on a point 
immediately on the summit of the above-described muscular organ, 
which directs its aperture towards the opening of the ductus. Even 
the whole glandular mass is included in the penis, and it is chiefly this 
which gives it its form. The penis transports spermatophores under 
copulation, being well adapted for such a function. 
Into the antero-lateral divisions of the bursa there open two small 
tubes which extend out over the ventral side of the bursa, and gradually 
approaching each other they fuse together immediately in front of the 
female genital aperture. After they fuse they separate once more, 
but unite yet again a little behind the oviduct, after which they quickly 
separate again and run separately until they terminate. They are 
narrow in the anterior portion, but much wider at the point of connection. 
They lie close to the ovaries on their ventral side, and extend over the 
same distance as these to the first and second abdominal segments. 
These tubes Johannson (1896) and Olsson (1876) found full of sperma¬ 
tozoa and are to be regarded as vesiculae seminales. Their openings 
into the bursa are so situated that when the bursa is protruded they 
lie one on each side. The possession of vesiculae seminales is peculiar 
to the genus Calliobdella. 
The female reproductive organs consist of a pair of ovaries which 
extend usually to the border of the second, and sometimes to the third 
abdominal segment. They unite in front in the middle line and open 
out into an ovidnct, which in this genus goes through the ring which 
is formed by the vesiculae seminales coming together, both immediately 
in front and immediately behind the oviduct. 
Eggs. According to Hesse, all the species of Calliobdella that he 
kept in captivity laid eggs freely. Those of C. lo'pliii were oval, about 
1 mm. in length at their greatest diameter, and adhered to the walls 
of the vessel in which the leeches were kept by a gelatinous secretion ; 
they much resembled the cocoon of Bombyx mori and were of a yellow 
colour, and their surface was covered with very crisp and curly “ silk.” 
The eggs of all the other species are, according to the same observer, 
hemispherical. 
General Note. The disagreement between the descriptions of Van 
Beneden and Hesse and his specimens led Blanchard to place them in the 
genus Trachelobdella, but the great differences between Blanchard’s 
diagnosis and that of Johannson can only lead me to the conclusion that 
they have been examining quite different animals. For instance. 
