EXPLANATION OF PLATES 107 
Fic. 10. Galium tinctorium. The embryo-sac. The constriction of the endo- 
sperm salt and the irregular nucleus are to be seen. 
Fic. 11. Galium Mollugo. Two embryo-sacs produced in the same ovule. 
; Ovule with endosperm and young embryo. The 
Fic. 12. Galium Parisiense. An AYSE: The embryo has begun its 
: Fic. 15. The lower half of a mericarp of Galium Mollugo. The undigested walls 
of the salle lining the micropyle are to be seen at the end of the suspensor. emb, em- 
bryo ; end, endosperm ; /, funicle ; 7, integument; 2, pericarp; 5. e, stylar column. 
PLATE 8. Asperula 
Fic. 1. Asperula azurea. A nucellus in an incipient stage of development. 
Fic. 2. Asperula setosa. The migrating megaspore. 
Fic: 3. Asperula azurea. An embryo-sac. Here two antipodals attain a spher- 
ical form. 
Fic. 4. A young embryo, In this form the suspensorial haustoria reach a high 
degree of نی‎ 
Fic. 5: Asperula sp. An embryo showing the extreme development reached by 
the suspensor in this form. The surrounding outline represents the limit of the endo- 
Fic. 6. A. azurea. This figure illustrates the persistence of the suspensor till a 
late stage of embryonic growth. 
Fic. 7. A. galivides—embryo- c. 
Fic. 8. A. gulioides. A rather early stage in the development of the embryo. The 
haustoria are و رو‎ to erg out into the endosperm 
. galioi f an deans which has reached a still 
Fic 
greater degre ef ver re bel depicted in fig. 6. 
PLATE 9. Asperula montana 
Fic. 1. Pollen mother-cell nucleus in the stage of diakinesis. 
Fic. 2, a, b, c, d, e. Chromosome pairs and rings from prophases of the nucleus 
of the ی کر‎ cell. 
ollen mother-cell, early anaphase of the first divisio 
indle, the end of which is seen ی‎ to the ecto- 
FIG. 5, a, û, c. Chromosomes, early anaphase, division (2. m 
"IG. 6. Late anaphase ; chromosome pairs show 
ing three EEE 
Fics. 7-9. Chromosome pairs from anaphase, first division (p. m. c.). 
Fic. 10. End of spindle (anaphase, first division) attached " means of kino- 
plasm strand to the ectoplasm. 
FiG. 11 al first division (f. m. c.). 
Fics. 12, 13. d of the first divisiobirealing stage (P. m. ¢.) 
Fic. 14, a, ۰ e i pmi telo phase, first division. 
Fic. 15, a, 4, c, d. Chromosome pairs during m — of the second division. 
Fic, 16. Pluripolar diarch spindle (second division, 7. m. 
