52 Investigations on the Life-History 



numerous in those caught in July and August than in those caught in 

 spring, or even in May and June. The autumn fish contained a greater 

 number than the spring, but fewer than the summer fish. 



2. GENERAL CHARACTERS OF THE MICRO-ORGANISMS CULTIVATED. 



(a) Absence of Micro-Organisms. 



In three fish, all caught in October (one in the upper waters) no 

 organisms appeared in any of the tubes : 



TABLE IY. 



GIVING THE KESULTS OF THE BACTERIOLOGICAL CULTIVATIONS. 

 1. No Organisms Groivn from the Alimentary Canal. 



2. No Organisms Grouni from 



3. Only Moulds Grown from 



