C. L. Boulenger 
207 
This species was found on several occasions in considerable numbers 
both in the colon and caecum. 
Cylichnostomum insigne sp. n. 
Specific diagnosis. Cylichnostomum : Head not separated from 
the body, 190-250ja in breadth. The mouth-collar is comparatively 
narrow and separated from the rest of the cuticle by a marked con¬ 
striction. 
The lateral head-papillae are prominent and project from the surface 
of the mouth-collar to form “horn’’-like processes, less developed, how¬ 
ever, than those of C. auriculatum Looss. The submedian head-papillae 
are short and leaf-shaped (Text-fig. 3 a). 
The external leaf-crown consists of about 36 large pointed leaves, 
the leaves of the internal crown are however very inconspicuous, the 
latter appearing as a finely striated zone immediately in front of the 
mouth-capsule (Text-fig. 3 a). 
The mouth-capsule is large having a depth of 46-66/x and a 
maximum breadth of 130-200/a. The w^alls of the capsule are con¬ 
siderably increased posteriorly so as to form a hoop-like thickening 
similar to that found in C. elongatum Looss and C. auriculatum Looss. 
There is no dorsal gutter and the oesophageal funnel is scarcely 
developed (Text-fig. 3 a). 
The oesophagus is long, 700-900g, rather narrow anteriorly, it 
broadens out behind the level of the nerve-ring and attains a maximum 
breadth of 200-330 g. 
The excretory pore is situated at approximately the level of the 
junction of oesophagus and intestine, its position is therefore a little 
further forwards in the body than that of C. auriculatum (Text-fig. 3 b). 
The cervical papillae occur just in front of the excretory pore, 
900-950/X from the anterior extremity. 
Female : 13-5-15 mm. in length, the maximum breadth near the 
middle of the body is 740-850/x. 
The vulva is relatively close to the posterior extremity (300-430/Li); 
at this level the body has a breadth of about 300/x, it tapers gradually 
behind this point to the level of the anus, 160-250/x from the posterior 
end. Behind the anus the “tail” narrows suddenly (Text-fig. 3 c) 
and forms a little pointed tip usually bent in a dorsal direction. The 
subcuticular tissue in the neighbourhood of the vulva is usually thickened 
in places so as to form irregular swellings, sometimes in the shape of 
