of the Salmon in Fresh Water. 



57 



4. Large dense creamy colonies slowly liquefying the gelatine into hole,-- 

 with sharp edges, no pigment formed. Very minute bacteria : 



5. Bacilli liquefying gelatine and forming a light yellow deposit without 

 colouring the supernatant fluid : 



(b) Organisms not Liquefying Gelatine. 



1. Bacillus coli communis (cf. Table IV., 5, p. 53). 



2. Small round yellow colonies, formed by short bacteria, often in 

 pairs, with rounded ends, very like micrococci, some in zoogloea. The 

 outer ends of those joined in pairs stain a darker colour. The pigment 

 formed was very bright in colour, and the growths were raised above the 

 surface of the gelatine in a similar manner to those of yeasts. 



This bacterium was grown from the oesophagus of Fish No. XII., 

 July 1895, No. XXVII., June 1396, No. LXX., October 1896 ; from 

 the stomach of Nos. XXIV. and XXV., May 1896, No. LXX.. 

 October 1896 ; and from the intestine in Fish No. VI., March 1896, 

 No. XXVI., June 1896, No. LXIX. and No. LXX. in October 1896. 



3. Small round yellow colonies of cocci, which were usually present in 

 the form of diplococci ; the growths were raised on the surface, and like 

 nail heads. 



These diplococci were only found on two occasions, both during the 

 month of November 1895, in the oesophagus of No. XXXIII. and of 

 No. XXXVI. Both these fish were caught in the lower waters. 



4. Organisms forming creamy moist circular colonies on gelatine. The 

 growths were white, faintly tinged with yellow in colour, raised on the 

 surface of the gelatine, circular and moist. The organisms present were 

 small non-motile bacteria, many of them looking like dumb-bells. They 

 were found along with colonies of a very similar appearance, but which 

 liquefied the gelatine, in the cesophagus of Fish No. XI., 1895, and in 



