ORGANIC SYMMETRY IN ARMADILLO QUADRUPLETS. IQI 



scutes of one individual with another we should bear in mind the 

 numbers of scutes in the various bands dealt with. 



2. Classification of Types of Inheritance and Resemblance among 



Quadruplets. 



Analysis of the individual cases reveals several well-marked 

 categories : 



(A) Strikingly close resemblances between mother and offspring, 



or among the different fetuses of a set. 



(B) Cases of symmetry reversal between parent and offspring. 



(C) Cases of mirror-imaging among the fetuses of a set. 



(D) Cases of half-band reversals of symmetry between mothers 



and offspring. 



() Cases of half-band reversals between different fetuses of a 

 set. 



(F) Cases of half-band reversals in the same individual. 



(G) Longitudinal reduplications down the long axis. 

 (If) Transverse reduplications in a single band. 



Each of the categories will herewith receive separate attention. 



A. Strikingly Close Resemblances between Mother and Offspring, 

 or Between the Different Fetuses of a Set. Cases are here dealt 

 with in which the form of the anomaly, its localization and sym- 

 metrical relations are the same, or very nearly so, in two or more 

 members of a set, the mother included. The most striking cases 

 are considered first. 



Set K 27 (p. 189) shows the most remarkable case of exact 

 resemblance. The mother has two double scutes in two different 

 bands, and one of the offspring (fetus i) has the same double 

 scutes in the same positions of the same two bands as in the 

 mother. Here we have a little difficulty due to locating the 

 morphological middle of the first band. If we take the arith- 

 metical middle, as has been done, the double scute of band i of 

 the mother is five scutes from the middle, but that of fetus I. is 

 four scutes from the middle. If we count from the margin, 

 however, the scute is number 28 from the left in both cases, for 

 there are two more scutes to the band in the mother than in the 

 offspring. 



