146 TOKIO KABURAKI 
at many points in connexion with the oviduct. The vitelline 
glands consist of large round cells closely packed, each of which 
contains a highly granular nucleus and highly refractive proto- 
plasmic bodies. Probably, at the time when the ova are 
passing down, the cells break down and make their way into the 
oviduct. They are considered to take part in connexion with the 
nutrition of the ova and also with the formation of the cocoon 
capsule. 
The oviduct arises from the mid-ventral aspect of the ovary 
as a wide passage ; this soon assumes the character of a narrow 
canal, which proceeds straight backwards, just along the out- 
side of the nerve cord. In the region of the genital opening 
the oviduct nears the median line, rising upwards at the same 
time, and finally unites with its fellow of the opposite side, at 
a point behind the penis, to form the rather wide glandular 
canal. The oviduct shows a distinct lumen along its entire length. 
Its actual wall is made up of a layer of distinctly nucleated 
columnar cells, with well-developed cilia projecting mto the 
lumen of the oviduct. Immediately external to the layer 
mentioned comes a layer of circular muscular fibres. 
As already indicated, the oviduct receives the vitelline glands 
at several pots of its course. The mode of connexion seems 
nearly similar to that described by Moseley (22), Dendy, von 
Graff, and others, in several forms. The glands stand in com- 
munication with the oviducts by means of the short branches 
of the latter, which are situated at tolerably regular intervals. 
The glandular canal, mentioned above, runs anteriorly and 
obliquely downwards to open from behind into the atrial 
passage, between the penis-sheath and the vestibulum. ‘The 
canal is constructed in the same manner as the oviduct, and is 
lined with an epitheium made up of ciliated columnar cells 
resting upon a fine basement membrane, beneath which exists 
a muscular layer composed of circular and longitudinal fibres. 
Numerous glands are found all round the canal, into which they 
open. 
The present species is wholly devoid of any trace of the organ 
representing the seminal receptacle. As already indicated, the 
