C. L. Boulenger 
209 
The dermal collar of the genital cone is well developed, especially on 
the ventral surface. The appendages of the genital cone (Text-fig. 
4 B, A.g.c.) are broad and fused together in the middle line, each bears 
a little papilla-hke process. 
Cylichnostomum insigne is undoubtedly closely allied to C. auriculatum 
Looss, the species is however a little smaller in size and differs from the 
latter in a number of characters; thus the horn-like processes formed 
Fig. 4. Cylichnostomum insigne A. Lateral view of male bursa, x 72. B. Ventral 
view of the genital cone to show the appendages, x 140. C. Terminations of the 
spicules, X 376. 
by the lateral head-papillae are less developed than in C. auriculatum 
and the cervical papillae and excretory pore are situated more anteriorly 
than in that species, although considerably further back than in the 
majority of the species of the genus. In some respects C. insigne is 
intermediate between C. auriculatum and C. elongatum Looss. 
The species was found on one occasion only, in small numbers, at 
Beoley, near Redditch, Worcestershire. 
