294 



MR. H. A. BAYLIS AND LT.-COL. CLAYTON LANE ON 



(text-fig3. 37, 38 ; PI. VII. fig. 29) carries from 8 to 11 rows of 

 hooks (text-fig. 39). Tlie comb-like spines immediately behind 

 the head (text-fig. 40, a) carry on their straight distal edges foar 

 .short points. These rapidly give place to three-pointed spines 

 (text-fig. 40, 6), the middle point of which is typically the longest. 

 Spines of this type extend posteriorly to beyond the termination 



Text-figure 38. 



^ 0-3 mr-. 



Gnathostoma sphiigerum. Anterior end; lateral view (surface). 



Text-fignre 39. 



Gnathostoma spinigerum. Hooks from the head-biilb : a, surface; h, profile view. 



of the oesophagus. There follow progressively two-pointed and 

 single-poiiited spines (text-fig. 40, c, cZ), which in turn dimiaish 

 in size so that at 8 mm. from the head-end they form mere 

 points protruding beyond the transverse striations of the cuticle. 

 These soon disappear, leaving the posterior part of the body 

 naked, except for the spines to be described below on the tail of 

 the male. 



