976 The American Naturalist. [November,. 
traces to one side, and in all such cases we may be certain that 
some of the individuals have similar trending to the opposite 
side. 
The structure of the embryo, and of the seed as conforming 
to the embryo, is very closely identical with that of the adult 
plant, and is of use to us when the other evidence is hidden. 
Thus fig. 6 shows the flat surface of a coffea-akene; half of the 
akenes are of this pattern, the other half resemble the image 
of this in a mirror. Fig. 7 shows a cross-section (r) of fig. 6; 
Fig. 6. Fig. 7. Fig. 8. 
and also (/) of the antidrom of fig. 6, under the same orienta- 
tion, and thus revealing the reverse order of the infolding of 
the endosperm. Fig. 8 presents the seed and embryo of 
Nelumbium ; on seeing this I predicted the existence of other 
seeds with the embryo facing the opposite way, and promptly 
Mr. Barney and myself fished out of the Lily-ponds of Spring- 
field, Mass., plenty of seeds which showed, under similar orien- 
tation, the embryos facing some one way and some the oppo- 
site way. The petalsof Water-lilies are also diversely enfolded 
in the bud of different plants. The seeds of Lima-bean were 
found to have characteristic differences in the mode of enfold- 
ing upon each other of the first two foliage-leaves ; and all the 
seeds growing on one valve of the pod were of one character, 
whilst those growing on the other valve were the antidroms of 
the former. The germinating pea sends up its plumule with 
a slight twist to one side or the other. The embryo of Bass- 
wood, with its large 5-lobed cotyledons, shows antidromic 
twists as between different seeds; and diversity is seen in the 
