348 BOTANICAL GAZETTE [MAY 
of the same species, many fusions were obtained; but in not a single 
case among the combinations tried was fusion obtained between an egg 
and a sperm of different species, in spite of the fact that sperms were 
in a few cases observed in contact with the egg. 
The results of this portion of the investigation are shown in the 
following tables. In the first table are given the results of the experi- 
ments where the prothalli were sectioned and examined for fusions; 
in the second table are given the results of the experiments where the 
prothalli were replanted on soil in the effort to obtain sporelings. 
In the first table only those cases are included in which sperms 
were observed, in the sections, within the venters; in several other 
cases sperms were found in the necks of the archegonia, but not in 
contact with the egg. Not every entrance means the possibility of 
fusion, since entrance often occurs in archegonia whose eggs are bad 
and even in empty archegonia. It is impossible, however, to tell 
with certainty from sections whether an egg is good or bad. In order 
_to eliminate the error of personal judgment, entrances have been 
counted in all cases where the venter contained an egg, regardless 
of whether this egg was good or bad. It was very evident in many 
TABLE OF RESULTS OBTAINED FROM SECTIONS 
A ‘umber of 
2 $ Name | aurances. | sions 
Gansta 
ie io alge mee a2 ee ag is 6 10 7 
oveboracensis.......... D. Thelypteri 8 67 . 
Phely pets SOT Se are Dz. iuelnyacbasis I I - 
Wy: PHATGIRANIS, ey ay. inalis 5 ° : 
, Dy Thelypteris. 2.0.05. D. Thelypteris I - . 
Ly. mernae os. D. Thelypteris 4 is ie 
DD. Thelypieeit <5. ove. 3: D. margi 5 * , 
A), moatgineig, . D. noveboracensis 16 5 oh 
D, marginalis.............. Pteris multifid, 8 9 : 
Pteris multifid ultifir 41 78 ” 
Athyrium Filix-foemina..... P. multifida 14 a5 . 
A. Filix-foemina........... A. Filix-foemina 6 9 7 
A. Filix-foemina.....,..... Asplenium oe 5 6 2 
A. Filix-foemina........... As. platyne II 17 . 
A. Filix-foemina........... As. Sater and 
A, Filix-foem 2 9 : 
As. platyneuron............| A, Filix-foemina and 
As. platyneuron 2 z : 
As. platyneuro ..| Camp. rhizophyllus 2 r o 
Camptosorus shizopyius .-| As. platyneuron 4 4 : 
As. montanum .:525500405 07 | As. Bradleyi 28 , [ 
a ee 
* Pteris multifida Poir., CHRISTENSEN in Index Filicum 602. 1906. 
