42 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



Figure 4. — Development of lordosis in a 3-inch kokanee injected intraperitoneally Sept. 30, 1951, with Mandler filtrate of 

 suspension made from tish with lordosis and scoliosis. The first symptoms were observed on Nov. 3, and progression 

 of the disease is shown in the photographs taken Nov. 9 (upper left), Nov. 16 (upper right), Nov. 23 (lower left), and 

 Nov. 30 (lower right). 



Figure 5. — Development of scoliosis in a 2-inch kokanee injected intraperitoneally Sept. 30, 1951, with Mandler filtrate of 

 suspension made from fish with lordosis and scoliosis. The first .symptoms were observed on Nov. 11, and progression 

 of the disease is shown in the photographs taken Nov. 12 ( upper left ), Nov. 10 (upper right ). Nov. 23 ( lower left), and 

 Nov. 30 (lower right I. 



