424 



Harris Hawthorne Wilder 



and their associated parts were farther apart and therefore more nearly 

 normal. This form of comparison, the cosmobiogenetic, is precisely 

 that advocated in the introduction and has yielded excellent results. In 

 this form of comparison the most effective method consists in drawing- 

 separate and complete diagrams of each of the components involved in 



Fig. 32. Diagrams representing the relations of the eye muscles iu the 

 inner eyes of monsters of the diprosopic group. 



(a) Condition shown by Teras I, in which the two eye components are 

 close to one another, but distinct. 



(b) Condition sliown by Teras XII, in which the components are more 

 closely approximated. 



a, rectus superior ; b, rectus internus ; c, rectus inferior ; d, rectus externus ; 

 o.obliquus superior ; p, obliquus inferior ; /(, retractor bulbi : .r and x', muscles 

 of unknown significance occurring in Teras XII. 



their usual form upon two pieces of thin paper, and then superimposing 

 the one over the other at exactly the degree of proximity and at the 

 angle of divergence suggested by the entire monster. The diagram thus 

 formed suggests, often in detail, the relationships to be expected and 

 serves as a key to their interpretation. 



