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Charles L. Boulenger 
greatly thickened to form a “hoop-like” ring similar to that described by 
Looss (1901) in C. elongatum, and C. auriculatum. There is no dorsal gutter. 
The oesophageal funnel is very large and enclosed in the broad anterior 
end of the oesophagus, the latter, 0*75-0-85 mm. in length, is 0*2-0*25 mm. 
wide in the region of the funnel, narrowing to 0*12 mm. at the level of 
the nerve-ring and broadening out again to 0*23-0*25 mm. in the terminal 
region (Text-fig. 4). 
Fig. 4. Cylicostomum zebrae sp. n. Ventral view of the anterior extremity, x about 75. 
1 he chitinous lining of the oesophageal funnel is highly developed forming 
tooth-like ridges, but owing to the thickness of the oesophagus in this region 
their exact arrangement could not be ascertained, they are, however, indicated 
in Text-fig. 4. 
The excretory poie opens at the level of the junction of oesophagus and 
intestine. The cervical papillae are a little further forward, 0*8 mm. from 
the anterior extremity of the body. 
Female. The vulva is 0*25 mm. from the posterior extremity, at this 
level the body has a thickness of 0*23 mm. The anus is 0*1 mm. behind the 
vulva. Posteiior to the anus the depth of the body decreases suddenly, 
forming a flat triangular tail. The vagina has a length of about 0*5 mm. 
Male. The bursa (Text-fig. 5) is very similar to that of C. insigne Bou¬ 
lenger, the dorsal lobe is large and broad. The dermal collar is well developed 
