a1 
of the gametophyte. ‘These organs were not mature; the adult size had not 
been attained nor were the ventral canal cells cut off. 
A third kind of peculiarity was observed in two instances in which 
three archegonia formed a group at the geometrical center of the endo- 
sperm. There was no sheath layer between adjacent sides of their central 
cells, but on all other sides they were surrounded by the typical jacket 
layer. In one archegonium of this group a ventral canal cell was in 
process of formation; the other two were younger. No canal or opening 
leading to the surface of the gametophyte could be made out, neither were 
any necks distinguishable in connection with these nor with many other 
cases mentioned in preceding paragraphs. 
A fourth peculiarity to be recorded is the premature arrival of the 
end of the pollen tube at the archegonium. In two different cases out of 
the material used the pollen tube had reached an archegonium in which 
the ventral canal cell had not been formed, nor bad these organs attained 
their adult size. In one of these instances the tube had actually pene- 
trated the archegonium, but had not discharged its contents. 
Of the number of ovules of Pinus austriaca in the collection from which 
these anomalies were found, about one-tenth showed archegonia in either 
end of the endosperm. <A few anomalies similar to those were observed 
in Pinus virginiana. in this paper the author has endeavored only to 
record the facts as observed, reserving a discussion of their probable sig- 
nificance until more data will have been collected. 
