J. A. Innes 
(3) G. gregarius, Looss 1896. 
Gut branches are short and do not reach the level of the testes which are situated 
close to the body wall. 
(4) G. wenyoni, Leiper 1908. 
Gut branches do not quite reach the level of the testes. Laurer’s canal and 
duct of excretory vesicle unite to open exteriorly by a single aperture. 
(5) G. synethes, Fischoeder 1901. 
Gut branches are long and tortuous, reaching to the level of the testes which 
are situated close to the body wall. Atrium large. Uterus is clumped nearer the 
posterior end. Length 7-11 mm. 
(6) G. mancupat^is, Fischoeder 1901. 
Gut branches reach the neighbourhood of the testes, which do not lie close to 
the body wall but whose anterior ends project into the atrium in the form of a cone. 
The ovary, shell gland and part of uterus are placed between the testes. Length 
7-11 mm. 
(7) G. cobboldi, Poirier 1882. 
Gut branches reach back to the posterior sucker, and the testes are placed in the 
middle line, behind or under each other. Length 8-10 mm. 
(8) G. elongatus, Poirier 1882. 
Gut branches reach only to the middle of the body and pass near each other on 
the dorsal surface. Testes are placed like those of G. cobboldi. Length 13-16 mm. 
(9) G. minutus, Fischoeder 1901. 
This species is recognised by its small size, while the testes are not j^laced near 
the body wall but project into the atrium in the shape of a cone. Length 4-5 mm. 
(10) G. spatiosus, Brandes 1898. 
Gut branches only to the commencement of the last third of the body. Testes 
lie close to the body wall. Length 9-12 mm. 
