Ranson, Retrograde Degeneratioyi. 389 



Bibliography. 



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2. Klippel et Durante. '95. Revue de iMidecine, Vol. XV, pp. i, 142, 343, 



574. 655. 



3. Ranson, S. W, '03. /our. Coinp. Neurol., Vol. XIII, p. 186. 



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DESCRIPTION OF PLATE VII. 



The drawings, made by Mr. A. B. Streedain, represent retrograde degen- 

 eration in the corpus callosum of white rats, killed forty-five days after the mak- 

 ing of an incision in the occipital lobe. They were made from Pal-Weigert 

 preparations of frontal sections through the occipital lobe. 



Figurt I is from a rat operated on when sixty days old. 

 a and b, degenerating areas. 

 c, line of incision. 

 m, medial surface of the hemisphere. 



Figure 2 is from the same preparation as the former drawing. It represents 

 the appearance under the oil immersion lens of a small area designated by "a," 

 Figure i. 



Figure g is from a rat operated on when thirty days old. The lettering is 

 the same as in Figure i. 



Figure ^ is from the same preparation as Figure 3. It represents a small 

 area at "a" seen under the oil immersion lens. 



Figure j was drawn with the aid of the oil immersion from the degenerat- 

 ing corpus callosum of a rat operated on when 21 days old. 



