MISS E. 8. BARTON ON NOTHEIA ANOMALA. 421 
it. The large area of lining-cells thus produced shows of course 
very few hairs, for many of these have fallen off and the re- 
mainder have become separated from each other by the formation 
of the new cells. From these there now push up small out- 
growths which develop into antheridia, oogonia, and unbranched 
paraphyses (Pl. 13. fig. 8). 
Dr. Gruber describes the growth in size of the eryptostoma 
(or, as he calls it throughout, the conceptacle) as taking place 
through separation from each other of the cells surrounding the 
initial cell. My observations lead me rather to the conclusion 
that repeated cell-division of the lining layer and, later on, a 
growth in size of the individual cells take place, thus accounting 
for the appearance of new hairs, and later on of reproductive 
organs, from all parts of the cavity. In mature conceptacles 
the walls of the lining-cells are still connected with each other 
at their base, while the upper part becomes free by pushing up 
into the open space of the cavity. By this means the actual 
surface area of each such lining-cell is enlarged, and oue cell 
ean thus bear an oogonium and one or even two paraphyses. 
As I have pointed out above, the bodies which we now know 
to be antheridia were probably first noted by Harvey and Bailey, 
since the figure (7. c.) evidently refers to these bodies under the 
name of sporangia. They arise direct from the lining-cell of 
the cryptostoma, or conceptacle as it has now become, and contain 
numerous antherozoids (Pl. 13. fig. 9). They are about 55 u 
long and 15 u broad, resembling entirely the antheridia of 
Hormosira and other Fucacex. They grow in the same con- 
ceptacles as the oogonia, but are not so plentiful. This is, so 
far as I know, the only recorded case of antheridia growing 
directly from the walls of the conceptacle in the same manner 
as oogonia; and it was not until after an examination of a large 
number of conceptacles that I felt justified in regarding these 
bodies as antheridia and not as oogonia, of which the cell-contents 
had been in some way disorganized. But the regularity of the 
antherozoids, and the final confirmation of their existence in fresh 
material by Mr. Laing, placed the question beyond doubt. 
The general rule as to the position of the reproductive organs 
in Fucace, 7. e., that the antheridia arise on branched hairs and 
the oogonia from the walls of the conceptacle, is now shown to 
have exceptions in both cases. Notheia has ontheridia arising 
like oogonia, while Sarcophyeus (Miss F. G. Whitting, in 
