SPORE-FORMATION IN THE DISPORIC BACTERIA. 589 
sporic individuals were nearly always very much smaller than 
those with two spores, but looked quite normal in other ways 
(figs. 31 and 32 are two instances). And I also found— 
though these were rare—forms which had remained almost 
completely divided right up to a late stage in sporulation 
(fig. 30). I thus felt that my original deductions from B. 
Trxt-FiIc. B. 
LS~@e 
Ao . . JSR 
=) ott Se ato se 
re A is Once timex ear 
. 
Taeperenelele eee ee ous 
. pee ere Su Pe rane, ete 
CPA eile Soot ep pub ible) ieee B®, 
A. Spore-formation in Bacillus biitschlii or B. flexilis. 
1 . : . . . 
B. Spore-formation in B. spirogyra. (Diagrammatic.) 
spirogyra and B. lunula were considerably strengthened. 
There is absolutely no evidence whatsoever that any process 
of conjugation takes place in B. spirogyra before the final 
cell division. Nor do I think any sexual significance would 
have been attributed to the phenomena in B. biitschlii if 
the sporulation of B. spirogyra had been previously known. 
The comparison with yeasts and alge is, I believe, wholly 
misleading. I would also point out that the process in 
Actinospherium is not in any case strictly comparable 
with that in B. biitschlii: for in this—assuming conjuga- 
