154 



ASCARIS LUMBRICOIDES, Linn. 

 Plate XXI. 



Fig. 1. Adult male, natural size. 



Fig. 2. Adult female, natural size. 



Fig. 3. Top view of bead enlarged; a, dorsal lip with two papilliB ; h, h, ventral 

 lips with one papillae each. 



Fig. 4. Head, ventral view. 



Fig. 5. Head, dorsal view. 



Fig. 6. The lips greatly enlarged and flattened: a, a, papillae; h.h, the serrated 

 edge of chitinous support. 



Fig. 7. Tail of male, ventral view: a, anus; 1, 2, 3, 4 and 5, 6 and 7, the post- 

 anal papilliT! ; 8, the unpaired pre-anal ; 9, 9, 9, other papilhe. 



Fig. 8. The two spatulate spicula: 8a, one of these enlarged. 



Fig. 9. Portion of female: a, the genital opening; b, the ventral line; c, one of the 

 two lateral lines. 



Fig. 10. Tail of female, lateral view. 



Fig. 11. The same, ventral view. 



