-21- 



Fig. 10 - Common arrangements of natural assemblages representing Scottognathus : 

 A, Scottognathus typicus (Rhodes) after Rhodes, 1952, text-fig. 2, 

 p. 891; B, rearrangement of Scottognathus typicus in light of new 

 collections from Bailey Falls; C, example of simple scatter arrange- 

 ment; D, example of simple contraction arrangement; E, example of 

 simple rotation arrangement; F and G, examples of arrangements result- 

 ing from combinations of contraction and rotation (all approximately 

 X 16.6). 



