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XIII.— THE BACTERIOLOGY OF THE OYSTER AND OTHER 
SHELLFISH. 
Our investigations under this head have been made in the following directions : — 
1. 77/1? Identification and Differentiation of tJie Bacillus typhosus and B. coli 
communis. 
2. The action of sea-water upon the groivth of the Bacillus typhosus. 
3. The infection of the oyster xvith the Bacillus typhosus. 
4. The bacteria present i?i the alimentary canal of the oyster and other shellfish. 
5. The occurrence of Bacillus enteritidis sporogenes in shellfish. 
In September, 1896, an abstract of our results was published at the Liverpool 
Meeting of the British Association, and shortly afterwards the Local Government Board 
Report upon "Oyster Culture in Relation to Disease" appeared (November, 1896). 
The report was a very full one, and was furnished by Dr. Bulstrode and Professor 
Klein, and summarised by Sir Richard Thorne Thorne. The ground covered by 
Professor Klein and by ourselves was much the same, and our results approximated to his. 
Since then we have continued the work, and have repeated and extended our observa- 
tions, of which the following are the more important. 
I. — The Identification and Differentiation of Bacillus typhosus and 
B. COLI COMMUNIS. 
We have systematically tested the majority of the chief differential reactions 
upon samples of B. typhosus and B. coli obtained from numerous sources, and have in 
all cases found unmistakable differences between the two bacilli. 
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