96 
groups were separated from each other by a layer of tissue from one to 
three cells in thickness. The central cells of two of the archegonia of 
the end group had fused at the outer ends only, although the sheath cells 
had entirely disappeared along the contiguous sides, leaving only a deli- 
cate line between the plasma membranes of the slightly shrunken cells. 
No nuclear fusions had taken place. Near each of these several arche- 
gonia one or more sheath cells had begun to bud out apparently to form 
archegonia as figured by Miss Ferguson (lc, Fig. 265). In several 
preparations showing one or more of the anomalies herein mentioned, the 
enlargement of one or more of the sheath cells was of frequent occurrence. 
These enlarging cells possessed each a large nucleus and a dense cytoplasm, 
showing that they were being well nourished. In one ovule presenting 
a group of archegonia at each end of the endosperm, two large cells very 
poor in cytoplasm and about one-third the size of the normal archegonia 
lay between a normal archegonium and the end of the gametophyte at the 
chalazal extremity. From all appearances they had developed from 
sheath cells. They were not surrounded by jacket cells, hence their sparse 
cytoplasm. 
Of this class of anomaly, namely, the presence of archegonia at oppo- 
site ends of the gametophyte, a few cases were observed in which there 
were three separate groups, one at each end and one at one side nearly 
midway between the extremities. In another instance the nucleus of the 
central cells had divided, the two daughter nuclei, which were well formed, 
lying in contact side by side. In this ovule all archegonia were immature; 
the ventral canal cells were not formed, and there was no fusion of the 
central cells. The two nuclei must, therefore, have been formed by the 
division of the nucleus of the central cell. 
A second class of anomaly was observed in a single instance. It was 
the presence of a pollen tube containing supernumerary nuclei. This tube 
had grown down prematurely along one side of the endosperm and had 
just begun to indent the latter. The tube contained the two male nuclei 
surrounded by the cytoplasm of the body cell, together with about twelve 
other nuclei varying greatly in size. The largest of these nuclei were 
about the size of the male nuclei or larger. Their structural details 
were sharp and distinct; each contained a very distinct, but delicate, 
nuclear net with two or more relatively small nucleoli. In the same oyule 
another pollen tube had traversed about two-fifths of its way down through 
the nucellar tissue. In tbis ovule archegonia were present at each end 
