J. W. Jp^NKINSON 
197 
TABLE XLV. 
Eggs spaced. Aa-es vertical. 
All cases. 
An<?le between Angle between 
Sperm-path and Sperm-path and 
Plane of Symmetry First Furrow 
0—15 33 43 
15—30 13 8 
30—Ji5 7 1 
Jt5—60 1 2 
60—75 1 1 
Totals 55 55 
0-= 13-56° ±0-87°. (7 = 12-58° ±0-81°. 
When Sperm-path titrns away from Furroiv. 
0—15 17 24 
15—30 9 6 
30—Jf5 4 0 
Totals 30 30 
0- = 10-72° ±0-94. <r = G-00° + 0-53°. 
When Sperm-path is included in or parallel to First Furrow. 
0—15 8 
15—30 0 
30—Jfi 3 
Total 11 
„■ = 13-35° ±1-92. o- = 0°. 
When Sperm-path is turned towards Furrow. 
0—15 8 8 
15—30 4 2 
30—Jf5 0 1 
Ji5—60 1 2 
60—75 1 1 
Totals 14 14 
a- = 10-16° ±1-29. 0-= 19-65° ±2-50. 
close in the latter as in the former case, if not closer. This is due to the fact that 
there is a slight tendency for the First Furrow to place itself at right angles to the 
gravitation plane, that is, parallel to the ler)gth of the slide. Since, moreover, the 
spermatozoa enter the egg mainly from the compressed sides, there is already a 
considerable tendency for the First Furrow to lie in that direction, and under the 
conditions of the experiment the two are summed. The pressure, as such, seems 
to have little influence. 
In certain cases the Sperm-path is inclined away from the Furrow, none the less 
its inner end bends upon its outer end, and is found to be in, or parallel to the cell 
division. 
