144 



STRONGYLUS CONTORTUS, Rud. 



Plate XVIII. 



Fig. 1. Adult female, X6: a, head; b, ovaries wound arouud the intestines; c, c, 

 uteri ; d, a large paiiilke, just in front of and covering the vulva ; e, auus. 



Fig. 2. Adult male, XG. 



Fig. 3. Head : a, two barb-like papilhe ; b, mouth ; c, oesophagus ; d, intestine. 



Fig. 4. Eggs, highly magnified: a, eggs before they have left the ovaries; b, eggs 

 showing nuclei ; c, eggs after they have passed through the oviduct; d 

 egg with one cell; e, with two; /, with four; g, with eight; h, with 

 many; i, egg as it is laid. 



Fig. 5. Skin, showing nine of the eighteen longitudinal lines. 



Fig. 6. Portion of female : a, the intestine; b, h, the ends of the ovaries. 



Fig. 7. Caudal end of feuuile : o, the anus ; b, the vulva ; c, vagina ; d, d, uteri 

 tilled with eggs; e, oviduct; /, /, ovary; fj, intestine. 



Fig. 8. Spicula, enlarged. 



Fig. 9. Bursa, expanded to show costie : a, ventral ; b, veutro-lateral ; c, lateral ; d, 

 dorso-lateral ; e, dorsal ; /, spicula. 



Fig. lO.G roup of adult males and females, natural size. 



Fig. 11. Caudal end of male : a, bursa; &, spicula ; c, seminal reservoir ; d, intestine, 



