:30 



Art. 4.— T, Kaburaki 



common duct, which soon joins the glandular organ from behind. 

 The wall of the oviduct is composed of a ciliated epithelium and 

 .-a muscular layer of circular fibres. 



Text tig-, 14. Repi'oductive (jryans of B. monoMneatuut iu saj^ittal section, 

 diagramuiatically shown. 



Index letters as in text figs. 1 and 3. 



The glandular organ, situated dorsal to the vestibulum, is a 

 nearly spherical body with a sheath of parenchyme including 

 numerous muscular fibres, and anteriorly opens into the vestibulum 

 at a point close behind the opening of the penis-sheath. Its direct 

 wall is formed by an unfolded epithelium made up of non-ciliated 

 columnar cells of a glandular nature, which are placed very closely 

 together. Immediately external to the layer mentioned is a fairly 

 thick layer of nearly homogeneous tissue. 



^ote : — The parasitic nematode has long been known to occur 

 in the bodies of some land planarians. Embedded in the paren- 

 chyme of the specimen at present under examination are found a 

 few individuals of a small nematode parasitic, which appear making 

 their way through the body- wall. 



