144 



STRONGYLUS CONTORTUS, Rud. 



Plate XVIII. 



Fig. 1. Adult female, X6: a, head; 6, ovaries wound around the intestines; c, c, 

 uteri; d, a large papillae, just in frout of and covering the vulva; e, anus. 



Fig. 2. Adult male, X6. 



Fig. 3. Head : a, two barb-like papillae ; 6, mouth ; c, ossopliagus ; 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; A, with 

 many; %, egg as it is laid. 



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



I'ig. 6. Portion of female : a, the intestine ; 6, h, the ends of the ovaries. 



Fig. 7. Caudal end of female : a, the anus ; 6, the vulva ; c, vagina ; d, d, uteri 

 filled with eggs; e, oviduct; /, /, ovary; g, intestine. 



Fig. 8. Spiciila, enlarged. 



Fig. 9. Bursa, expanded to show costse: a, ventral ; J, ventro-lateral ; c, lateral; d, 

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



Fig. 10. G roup of adult males and females, natural size. 



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



