INHERITANCE OF VARIATES IN THE ARMADILLO 161 



mixed characters, but such a classification could at best be only 

 an approximation of the truth. In certain cases it may well be 

 that the conditions of father and mother are very much alike and 

 in such cases it would be impossible to tell where to class the set. 

 A few typical cases will serve to exemplify the conditions. 



Set C 4 may be taken as a type of sets in which all four fetuses, 

 in their scute numbers, fluctuate about the maternal condition. 

 The mother has 574 scutes, and the fetuses respectively 574, 579, 

 571, 576 (average 575) . Those that are not exactly like the mother 

 cannot be said to be a blend between the number of the mother 

 and that of the father, for some of the numbers are higher and 

 one lower than that of the mother. Other sets showing the same 

 condition are C 23, C 31, C 96, and so forth. 



Set C 47 is a good example of the type of set in which there is 

 a total lack of resemblance between mother and all the members 

 of a set, and in which the paternal number is evidently dominant. 

 The mother has 581 scutes and the four fetuses respectively 554, 

 559, 550, 559. Probably the father had a scute count of about 

 556. Other cases of this sort are C 20, C 21, K 25, and so forth. 



Set C 29 shows the type of mixed set in which one individual 

 closely resembles the mother and the other three depart widely 

 from the latter and presumably closely resemble the father. The 

 mother has 561 scutes and the fetuses, respectively, 549, 560, 

 547, 546. Fetus II is almost identical with the mother and I, 

 III and IV fluctuate about the number of the father whose scute 

 number was probably about 547. Other cases of this sort are 

 seen in sets C 73, K 10, C 34, and so forth. 



Set K 13 is an example of the type of set where one of the natu- 

 ral pairs closely resembles the mother and the other presumably 

 the father. The mother has 565 scutes. The pair of fetuses III 

 and IV have each 563 scutes, while the other pair, I and II, have 

 respectively 575 and 570. Other cases of this kind are to be seen 

 in sets C 75, K 9, C 27, and so forth. There are numerous cases 

 in which one of each pair resembles the mother and the others 

 do not. Set K 18 exemplifies such a condition. The mother has 

 559 scutes, and the fetuses, respectively, 559, 574, 559, 566. It 

 might be conjectured that fetus II, with 574 scutes closely re- 



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



