294 



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



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

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

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

 short poi'nts. These rapidly give place to three-pointed spines 

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

 Spines of this type extend postei-iorly to beyond the termination 



Text-figure 38. 

 Lp. 



Gnathostoma spinigerum. Anterior end; luteral view (surface). 



Text-fio-ure 39. 



Gnatlwstoma spinigerum. Hoots from the liead-bulb: a, surface; h, profile view. 



of the cesophagus. There follow progressively two-pointed and 

 single-pointed spines (text-fig. 40, c, d), which in turn diminish 

 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. 



