202 NAIADES. 
7a. l apex of embryonary sac and nucleus, 2 attaching 
cell of embryo, 3 radicle, 4 cotyledon, 5 site of plumula. 
8’. Ata rather earlier period, teguments partly detached 
shewing at same figures the foramen, the radiated struc- 
ture there of the integuments, the uniformly rounded 
surface of the nucleus. 
Ф, More advanced than 7’, l hilum ; 2,2 foramen both te- 
guments here mammillar, 3-nucleus and embryonary 
sac, 4 stalk of embryo, 5 embryo. 
9a. Embryo of do. 1 radicle and its attachment, 2 cotyle- 
don, 3 plumula. 
10. Section of young fruit, drupaceous part commencing. 
10a. Ovule of do. 1 hilum, 2, 2 foramen, 3 nucleus, 4 em- 
bryonary sac, 5 stalk of embryo, 6 embryo. 
11. Much more advanced, drupaceous coat nearly perfect, 
a its styliform apex. 
lla. Ovule of do. 1 hilum, 2, 2 foramen both mammille still 
discernible, 8 embryonary sac now having almost obli- 
terated the nucleus, 4 embryo. 
115. Embryo of same, same references as 9a. 
12. Fruit laid open, shewing the sutura in the drupe. 
12a. Long section of do. a pericarp, б drupaceous coat, с 
teguments of seed, d embryo, e recumbent cotyledon, 
f situation of plumula. 
125. Lateral view of embryo. 
12c. View of its front which is next the foraminal side, a 
conical process dentiform near foramen, à chink for 
emission of plumula, 
124. Long section, at а plumula seen. 
12е. Same under pressure. 
SPATHIUM. 
Mr. Edgeworth had about the same time, or very probably 
previously, to the foregoing observations, come to the same 
conclusion with myself regarding the embryo of this genus,but 
he had pushed his enquiries much farther, and had ascertain- 
