56 TRANS: OF THE ACAD. OF SCIENCE. 
last progeny on their own bosom !—which, probably, is the original’ 
process, and is realized by the “opposite” disposition (applied 
face to face—see Bean, in the diagram) of the two solitary ger- 
minal leaves (cotyledons) of Dicotyledonous vegetables. If not, 
fertility was derived from the first cell, and ceases simultaneously. 
Cyclar Numbers. 
The lowest’ occur only in the seeds, namely, 1,2 & 3. Whene 
ever a single leaf appears on the stalk, as in Pontederia and Par- 
nassia, they are not really sole, but there are other foliar organs, + 
of scaly nature, at the base of the stalk, completing a higher 
cycle. 
