351 
Fig. 1. Aneimia collina, Raddi, showing the eelworms in the'tissue of the frond 
under the epidermis x 300. 
Fig. 2. Pteris Droogmantiana, L. Linden. The dark streaks are caused by the 
eelworm. 
Fig. 3. Adiantum Capillus-veneris, f. fissa, showing dark patches due to eelworm. 
Fig. 4. Lygodium volubile, Sw., with dark streaks caused by eelworm. 
EXPLANATION OF FIGURES IN PLATE. 
Heterodera schachtii, Schm. 
1, Young sugar beet attacked by eelworm. Nat. size. 
2. Male of sugar beet eelworm. x 500. 
3. Female of sugar beet eelworm. x 500. 
4. Section of female of same filled with eggs. x 500 
5. Eggs of same in different stages of development. x 1200. 
6. Female eelworms of sugar beet attached to rootlet of sugar 
eet. x 250. 
7. Spear, or piercing apparatus of eelworm. x _ 1200, 
8. Sugar beet eelworm on rootlets of potato. Nat, size. 
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