86 ILLINOIS BIOLOGICAL MONOGRAPHS [436 



EXPLANATION OF PLATE 



Figures i to 4. Andrya primordialis. 



Fig. 1. Proglottid at sexual maturity, dorsal view; ovary and uterus omitted. 



Fig. 2. Proglottid at sexual maturity, ventral view, to show ovary and uterus. 



Fig. 3. Uterus of nearly ripe proglottid. 



Fig. 4. Scolex, drawn from temporary mount. 

 Figures 5 to 8. Andrya communis. 



Fig. 5. Proglottid at sexual maturity, dorsal view; ovary and uterus omitted. 



Fig. 6. Proglottid at sexual maturity, ventral view, to show ovary and uterus. 



Fig. 7. Ventral view of vitelline and shell glands and female genital ducts. 



Fig. 8. Diagram of excretory ducts and cirrus pouch, showing a different ar- 

 rangement from that shown in Figure 5. 

 Figures 9 to II. Andrya macrocephala (see also next plate). 



Fig. 9. Mature proglottid, dorsal view, uterus omitted. 



Fig. 10. Mature proglottid, ventral view, to show uterus. 



Fig. 11. Fully developed uterine embryo, middle membrane omitted. 



