364 



1)R. H. GADOW ON EVOLUTION 



Mar. 20, 



nor are such new spots developed in the stripes. Pale brown field- 

 spots are invariably present in youth and middle a,ge. The collar 

 is the strongest and most complete in the whole genus, without 

 granules, except here and there a granule inserted between 

 neighbouring scales of the ed^e. 



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-a^PCOG 



The evolution of the dorsal pattern is somewhat complicated in 

 detail, owing to the considerable amount of individual variation 



