H. A. Baylis 1 1 
The structure of the oesophagus and other organs of the anterior region 
has not hitherto been described. The mouth, which is laterally compressed, 
leads into a similarly compressed buccal cavity, with very thick cuticulai 
walls. This is followed by an oesophagus consisting of a relatively short 
i.l.p. 
Fig. 3. Crassicauda cvcissicuuda. Anterior end of male; lateral view. Lettering as in tig. 2. 
anterior portion, which is scarcely, if at all, muscular, and a very long posterior 
portion, which is partly muscular and partly glandular. The latter portion 
may double upon itself several times in its course. An excretory pore has not 
been detected. 
