( 644 ) 
9. Bacillus prodigiosus. auratus 
10 . 
11 . ,, 
12 . „ 
13. ,f 
14. „ 
15. „ 
hyalinus. 
piscosus. 
„ albus (= 7 ?) 
albus (=4?). 
viscosus. 
„ albus. 
albus (= 5?) 
The relation and origin of these variants is given in the following table. 
aur. viscosus viscosus 1 hyaf. viscosus 
■V tv 
viscosus albus 
hyal.vis 
auratus <—<— prodigiosus normal - y hyalini 
roseus£ 
.albus* albus ' albus hyalinus hyaialbus 
The upward arrows denote “gain-variation”, the horizontal “qualitative ^ 
variation”, the downward arrows “loss-variation”. Dotted 
arrows signify that atavism has been observed. 
The two qualitative colour-variants, auratus which is orange- 
coloured and hyalinus of a deep vine-red, vary in a way quite corres¬ 
ponding to the normal form and like this throw off, under the 
same circumstances, slime-variants and white variants. Besides, the 
normal form may return by atavism as well from auratus and 
hyalinus themselves as from the variants derived from them. In the 
pedigree table atavism is indicated by dotted arrows for a few of the 
cases where it has been slated with certainty. But there is no doubt 
that also the other variants are disposed to atavism. 
It should moreover be noted that, the auratus -variant approaches, 
at least in colour, fhe natural variety Bacillus Kieliensis, but that 
the latter possesses a stronger power of fermentation, and produces 
much gas (CO, H,) from maltwort with dextrose or cane-sugar, 
the former fermenting only dextrose. 
hoi the rest, B. Kieliensis itself, which varies in a way quite 
analogous to that of the normal form of prodigioms here considered, 
has not yet beep obtained as a variant from the latter, 
