Fig. l.—Strongylus douglasi, Cobbold; male .r Magnification : 40 diameters (drawn with the aid of Edinger's apparatus). 
„ 2.—Strongylus douglasi, Cobbold ; female. Same magnification, drawn with same apparatus. 
,, 3. — Anterior end of a male, seen ventrally (a little oblique), so as to demonstrate the central nervous system and 
excretory pore. Magnification 240 diameters (drawn with the aid of Abbe-Apathy's Camera hicida). 
