236 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



Test 2 



[Vol. XV, 



1. 



X 



2. 



3. 



# 



# 



4. 



M 



ami 



una 



mi 



» 



» 



\ 



\_7 



7. 



Fig. 33.— Group Examination Beta, Preliminary Form, Test 2, Form Recognition. 



