412 



C. M. CHILD 



series 302 was wholly unnecessary, since under ordinary condi- 

 tions it is determined within five or six hours after section whether 

 a piece shall give rise to a head or not (Child, '14 d). 



In table 3 the column 'teratophthalmic ' is divided into two 

 columns, a and 6, which represent two different degrees of ter- 

 atophthalmia. Column a includes the cases in which the two 

 pigment spots of the eyes are distinct, but differ in size or are 



TABLE 3 

 Head-frequency in relation to motor activity of pieces 



somewhat asymmetrical in position. Column b includes those 

 cases in which the two pigment spots are more or less approxi- 

 mated to each other and united by a band of pigment or partly 

 fused. The forms of column a are somewhat nearer normal than 

 those of column h. 



The head-frequency data for these two series in table 3 show 

 that in every case the stimulated lots (II) have a distinctly higher 

 head-frequency, or more specifically, approach more closely to 

 normality. The difference appears as clearly in columns a and 



