Ward. — A Violet Bacilhis from the Thames, 71 
of movement, the morphological characters of Frankland’s 
species agree very well with mine, except that I have not 
observed the spores described as occurring in the agar- 
cultures. It is true that Frankland says they only occur here 
and there ; but since they bulge out the Bacillus, they ought 
to be easily seen. However, the authors give no further par- 
ticulars about these spores, and so it is impossible to form any 
opinion concerning them. In many respects, also, there are 
resemblances between the Franklands’ form and mine in the 
characters of the plate- and other colonies ; but they do 
not refer to the zoogloea-membrane, and describe the agar- 
cultures as forming a smooth, bright layer over the surface, 
and not a corrugated membrane. 
Perhaps the sum of the differences gives us sufficient char- 
acters to separate the two forms, and we may say that mine 
differs from the Franklands’ form in certain morphological 
characters : in forming no spores, in the marked development 
of zoogloea-membranes, and in the cultures on agar and 
potato. It might possibly be that the smooth, bright layer 
referred to by the Franklands is a young stage, or that they 
were working with a weaker form. I often find that after 
being some months in culture this form grows feebly on agar 
and potato. 
The B. violaceus Laurentins of Jordan agrees fairly well in 
size in forming no spores, and in some other morphological 
characters. The plate-colonies are very different, as are also 
the stab-cultures — especially as the author insists that no 
membrane forms above, and the gelatine rapidly liquefies 
in the tunnel. The cultures in milk and in broth are also 
markedly different. 
The B. violaceus of Mace is believed by Mace himself 1 2 to 
be the same as the Micrococcus violaceus of Schroter, and the 
one found by Bujwid in hail 3 . 
1 I assume that the breadth is 0.7 [i and not 7^', as stated in the original 
(1. c. p. 838), obviously by a printer’s error. 
2 Mace, Traite pratique de Baeteriologie, 1892, p. 541. 
8 Bujwid in Ann. Pasteur Inst., 1887, p. 592. 
