3O H. H. NEWMAN. 



with a larger and smaller series of double scutes arranged on 

 opposite sides. Fetus III. has the long series 28-29 six scutes 

 from the right, while fetus IV. has a series of 29-29 scutes 15 

 scutes from the left and extending past the middle. This is an 

 imperfect reversal of symmetry. There is a better reversal in 

 connection with the short series of double scutes, for in III. the 

 series of 10-12 scutes is situated 5 scutes from the left, and in IV. 

 the series of 9-10 scutes is situated 6 scutes from the right. 



Set A. 101 (Table 62) has the anomaly confined to one pair of 

 fetuses (I. and II.) and the expression is very different in the two. 

 It is well to note that although the doubling is nearly complete 

 in II. it starts after 6 single scutes at the margin, as is the case 

 on both sides of I., which shows a remarkably exact bilateral 

 symmetry. 



In the remaining sets, K. 8, K. 12, C. 90, C. 63, C. 69, C. 72, 

 C. 88, C. 32 and C. 41 (Table B2 and 3), band doubling is found in 

 only one fetus of a set. In most sets however scute anomalies, 

 which are usually rather definitely related to the band anomaly, 

 are present in one or more fetuses. Set K. 8 is remarkable for the 

 large amount of reduplication down the axis of scute anomalies, 

 for example fetus III. has double scutes in bands I, 3, 5, 7, and 8, 

 those on bands 5 and 7 being reversals of each other. It is 

 clear that all of the double scutes are in the same region of the 

 band as is the double series in fetus I., and the majority are on 

 the same side of the body. 



The remaining sets show nothing that has not already been 

 seen in sets previously described. 



SUMMARY AND CONCLUSIONS. 



Band anomalies are of the nature of irregularities in the normal 

 regular rows of scutes that make up the typical band, and consist 

 of more or less extensive regional doubling of rows of scutes in 

 a band. This condition is typical for the non-banded parts of 

 the armor but quite rare in the banded regions. It is practically 

 confined to the band or bands nearest the non-banded region. 

 Band anomalies occur in only about three per cent, of individuals 

 and an examination of over two thousand adult individuals 

 taken at random shows no duplicate anomalies. 



