18 
Fig. 9.— Gravid segment of D. latus, showing the rosette uterus in the median line, x 6. (After 
Leuckart, 1886, 887, fig. 368. ) 
Fig. 10. — Egg of D. latus. x 400. (After Looss, 1905, pi. 9, fig. 14.) 
Fig. 11. — Free swimming embryo|(onchosphere) of D. latus. Greatly enlarged. (After Schauinsland; 
from Braun, 1903, 200, fig. 147.) 
Fig. 12. — Two larvae (plerocercoids)of D. latus: a, with extruded head; b , with retracted head; from a 
fish ( Esox lucius). (After Braun, 1903, 201, fig. 149.) 
