NEMATODE PARASITES OF BIRDS 



169 



that in lateral view (fig. 242c) the head appears to bear 4 conspicu- 

 ous projecting papillae. Each of the four parts of these lips bears 

 on its outer edge a prominent thumblike extension. Lateral lips 



300/n 



JOO/U 



Fig. 240. — Cyknea excisa. a, Dorsal view; h, lateral view of head end; c, 



FEMALE ; d, MALE TAIL. AFTER SEURAT, 1914 



(fig. 242£> and c) very large, each bearing 2 digitiform processes on 

 its inner surface and 2 lateral winglike expansions which project 

 into the median groove of the dorsal and ventral lips in such a 



Fig. 241.— Cyknea skcrati. 



Tail end of male and of female. 

 Neyra, 1918 



After Lopez- 



manner as to give the appearance in some views of being processes 

 from the latter lips. There are 2 obscure lateral papillae near the 

 base of the lateral lips, which Dr. G. Steiner, on examination, stated 



