MTLLIPED GENUS CHEROKIA — HOFFMAN 237 



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Figure 2. — Distribution of the two paranoial forms discussed in the text and illustrated 

 in figure 3,a-b. The open area between the two patterns represents merely a gap in 

 the distributional data. Vertical shading represents the extent of marginal scapulorae, 

 and horizontal that of submarginal. 



ranging from 20 to 28 percent in the ratio of body width to length 

 (fig. 1). Over most of this area, comprising the northern half of 

 Georgia and the western part of South Carolina, the ratio is fairly 

 stable at 26-28 percent, but as the species invades the high country of 

 the Blue Ridge, there is a striking tendency toward a narrowed body 

 form with much lower w/l ratios, the trend culminating in the high 

 reaches of the Unicoi and Great Smoky Mountains. Even with this 

 clinal variation, however, one can utilize the fact that the change from 

 the normal broad body to the unusually narrow form occurs over a 

 relatively small area, and that the narrow form maintains itself as a 

 stable unit in a region where several other characters likewise attain 

 their strongest development. Despite the great dissimilarity of the 



