Species.

Authorities for habitat.

Oscillaria iridescens (Kütz)

See

P. 255

Saccardo, loc. cit., p. 937

B. leptomitiformis (Menengh.)..

*I.e., forms as to the synonymy of which we are doubtful.

Finally we append a tabular statement showing the duration of life note that the experiments quoted have been made under very be compared closely. Nevertheless, it has appeared advisable to in this connexion.

APPENDIX C.-Behaviour of Bacillus

of certain pathogenic forms in various waters. It is necessary to different conditions by the different observers, and that they cannot compile these results, if only to show how much remains to be done