some EHarthworms from India. 223 
garded by Perrier and Horst as the homologues of the seg- 
mental organs. In Typheus, however, they are somewhat 
different in appearance and far less conspicuous ; instead of 
being developed in close relation to the mesenteries, they are 
situated near the anterior margin of each segment on the 
ventral wall of the body. Their microscopic structure was 
hardly distinguishable, owing to the bad state of preservation 
of the specimens; but it evidently differed from the structure 
of the tuited glands in Megascolex affinis and Pericheta armata. 
Judging from the position of the organs, it seemed very likely 
that the external aperture was situated anteriorly to the inner 
pair of sete. ‘These glands appeared to be present only in 
the anterior segments of the body; behind the clitellum I was 
unable to detect any. 
In the most anterior part of the body, and occupying seg- 
ments 3 and 4, is a large gland on either side composed of a 
number of these glandular tufts aggregated together (fig. 2). 
Kisig has recently shown in the Capitellide that there 
may be more than a single segmental tube to each segment ; 
and, assuming that the glandular tufts of Typheus are 
really the homologues of the segmental organs of other 
worms, which seems very probable, this genus presents another 
example of the same phenomenon. It is possible that this 
structure corresponds to the “ glande A mucosité”’ described 
by Perrier as coexisting in Urocheta with segmental tubes of 
the normal type. 
Generative system.—I was unable to find the ovaries or any 
trace of an oviduct or its external opening, which is so con- 
spicuous in Megascolex. 
The male organs consist of a large pair of testes, which ex- 
tend through the 13th, 14th, and 15th segments. The vasa 
deferentia are two extremely fine tubes which open upon the 
17th segment; each unites with the duct of the prostate gland 
of its own side shortly before its external opening. The 
“ prostates ” are two large coiled glandular tubes situated, one 
on either side of the body, in the 18th segment. In the speci- 
men with a fully-developed clitellum the prostate was divisible 
into two parts—(1) the gland itself, a thick coiled bright- 
orange-coloured tube; (2) the duct, which differed in being 
of a smaller diameter and white colour. A thin muscular sac 
containing a number of specially modified penial sete (fig. 11) 
is present, and is rendered extremely conspicuous by its nacre- 
ous glitter. 
A single pair of spermatheces occupy the 8th, and open be- 
tween the 7th and 8th segments; each is provided with a 
short muscular efferent duct, at the junction of which with 
