Dr. Dickie on the Ovule of Euphrasia officinalis. 267 
Fig. 1. Part of an ovule with a tube issuing from the foramen and termina- 
ting in a closed extremity. 
Fig. 2. Embryo-sac and appendage. 
Fig. 3. Part of another more highly magnified, showing the tube which 
traverses the sac. 
Fig. 4. Neck and bulb of the sac with tube more highly magnified. 
18 * 
