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in the transverse plane. The Hnear type is the 

 faster-growing, thin but not necessarily tall group. 

 His lateral type, owing to the slower metabolism 

 of low thyroid activity, is slower in maturing and is 

 stocky and rounder in form; that is, the transverse 

 growth components are relatively greater than in 

 the linear type. Stockard's recognition of these 

 two types was a result of his long experimental 

 work on the factors of growth during the embryonic 

 development of animals. His descriptions of the 

 types are of such fundamental importance for an 

 understanding of racial and individual differences 

 in faces that it is necessary to quote them quite 

 fully: 



Taking the tip of the nose as the extreme anterior point 

 of the body and viewing the figure laterally, as seen in 

 figure 1 [118] we may draw a line which would indicate the 

 morphological lateral line. This line on each side of the 

 body separates the truly dorsal from the truly ventral 

 surface regions. When these lines on the two lateral sur- 

 faces of the head and body are thought of in space we may 

 imagine that the nearer they come together the more 

 linear is the individual, and the wider apart they diverge 

 the less linear and more lateral the individual type will be. 

 Figure 2 [117] illustrates this in the growth and develop- 

 ment of the two types from the infant condition. 



Examining figure 2B [117B] it is seen that when the 

 lateral lines are near together the head is of course narrow 

 or dolichocephalic. The interpupillary distance is short 

 and the eyes are close together, the nose bridge is narrow 



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