Dr. Dickie on the Ovule of Euphrasia officinalis. 267 



I"i(;. 1 . Part of an ovule with a tube issuing from the foramen and termina- 

 ting in a closed extremity. 



/''.7' 2. Embryo-sac and appendage. 



/V/7. 3. Part of another more highly magnified, showing the tube which 

 traverses the sac. 



I 'if/. 4. Neck and bulb of the sac with tube more highly magnified. 



18* 



