58 



Investigations on the Life-History 



the stomach of Fish No. XXV., the intestine of No. XXVII., and the 

 esophagus of No. XXXVIII., 1896. 



5. Small white colonies whose nature was not further determined. 

 These occurred in a great number of the tubes. 



(c) Yeasts, Moulds, and Sarcince. 



Very few organisms akin to the yeasts were found. In No. 36, 

 November 1895, a yellow torula was giwvn from the intestine, a yellow 

 sjircinae from the intestine of No. 35, in the same month, and in the 

 stomach of No. 70, October 1896, 20 yellow yeasts or torulse were found. 



The members of the mould class were much more numerous. Table 

 IV. gives a list of the sections in which moulds were the only organisms 

 grown. In the case of the oesophagus, cultivations of moulds alone were 

 almost entirely confined to the late autumn months, in the stomach to 

 three out of six the same applies, while in the intestine the season has 

 little to do with their appearance, two occurring in March, two in May 

 and June, three in July and August, and two in the later months. 

 Five of these fish were caught in the upper water. 



Examination of Table V., giving some of the results of the 

 bacteriological investigations in the fish caught at the river mouth, 

 shows that moulds were most numerous in the fish caught in March, 

 May, and June : 



TABLE V. (See also Table III). 



Similarly the fish caught in the upper water gave results a^ 

 follows : 



