THE MODES OF INHERITANCE OF AGGREGATES OF 

 MERISTIC (INTEGRAL) VARIATES IN THE POLY- 

 EMBRYONIC OFFSPRING OF THE NINE-BANDED 

 ARMADILLO 



H. H. NEWMAN 

 The Hull Zoological Laboratory of the University of Chicago 



CONTENTS 



Statement of problems 145 



General introduction 147 



The inheritance of aggregates of scutes in the nine bands of armor 153 



1. Polyembryonic correlation in the banded region 154 



2. Intra-pair correlation in the banded region 156 



3. Correlation between mothers and offspring: uniparental correlation. . 157 



4. Evidences of alternative inheritance of aggregates of meristic variates. 160 



5. Polyembryonic and uniparental correlations in individual bands 163 



6. Summary for the banded region 165 



Inheritance of aggregates of scutes in the tail rings 166 



1. Polyembryonic correlations in the caudal armor as a whole 167 



2. Further evidences of alternative inheritance of groups of meristic 



variates 169 



3. Correlation in individual tail rings 170 



Comparative study of scute aggregates in the five main armor shields 173 



Conclusions and summary 177 



Tables 181 



STATEMENT OF PROBLEMS 



After nearly four years' study of the peculiar inheritance situ- 

 ation presented by the armadillo it is now possible to make a 

 fairly definite statement of the problems involved and to attempt 

 a solution of some of them. The principal difficulty encountered 

 during the progress of the work has been one of orienting the 

 somewhat unique problems within the general field of genetics, 

 of definitely relating the data and conclusions to those of standard 

 lines of investigation in heredity and general biology. It would 



145 



THE JOURNAL OF EXPERIMENTAL ZOOLOGY, VOL. 15, NO. 2 

 AUGUST, 1913 



