8 
A New Leeeh 
abdomen, as is usual in the Ichthyobdellidae (except Abranchus). The 
testes lie in the 3rd and 4th annuli of the segment (Fig. 4). From each 
testis, as is usual, proceeds a small duct, the vas efierens; there being 
as many vasa efierentia as there are testes. From the posterior testis 
on each side the vas efierens passes inwards and upwards immediately 
into the vas deferens which in its course receives the remaining vasa 
efierentia. The vasa deferentia run some distance from the testes. 
In the posterior part of the chtellum each vas deferens takes on many 
curves and sinuosities, as it does in Calliohdella, and slightly in Piscicola, 
while in most genera (according to Johannson) it is perfectly straight. 
About the male genital aperture the vasa deferentia open out into ductus 
ejaculatorii which are not of very large size, and which open separately 
into a brrrsa of small dimensions which communicates with the exterior 
St. 
/ i 
vs n. bv. 
Fig. 5. Ganymedes cratere. Cross section of the animal in the region of the second 
abdominal segment. Diagrammatic, since the respiratory vesicles and the testes 
would not actually show in the same section as is obvious from Fig. 4. d.s. dorsal 
sinus; v.s. ventral sinus; l.s. lateral sinuses; r.v. respiratory vesicle; l.c. lymph 
cavity; st. stomach; «. ventral nerve cord ganglion; b.v. blood vessel; v.d. vasa 
deferentia; t. testes. 
by the male genital aperture. The forward-directed portion of the 
saccular bursa, as is usual in leeches, is developed so as to form a penis 
or copulatory organ capable of being protruded through the male genital 
aperture. The penis is conical, but does not include the ductus ejacula¬ 
torii. I have no information to offer as to whether spermatophores are 
formed. Vesiculae seminales are not present. The condition of the 
pern’s and bursa resembles that of the more primitive of the Ichthyo¬ 
bdellidae. The female reproductive organs consist of a pair of ovaries 
which occupy the major portion of the second segment of the abdomen. 
A short duct proceeds from the anterior end of each ovary which 
quickly unites with its fellow to form an oviduct (Fig. 6). 
