870 H. H. NEWMAN AND J. THOMAS PATTERSON 
probably differs only to a slight extent, yet the standard deviation 
and coefficient of variation of the males are decidedly higher 
than those of the females, a condition that accords with our pre- 
vious knowledge of the comparative variability of the sexes. The 
possible significance of this variational dimorphism will receive 
attention in the discussion of the hereditary control of sex. 
C. Variation in the individual bands 
In view of our studies of fraternal correlation among the foe- 
tuses it appears to be necessary to determine the scute variability, 
not only of the banded region, but also that of each of the indi-_ 
vidual bands. We will thus be able to determine whether there 
is a greater or less variability in individual bands than in the whole 
region under investigation; and in addition we can compare the 
variability of any one band with that of another. In table 4 is 
TABLE 4 
Showing distribution of frequency of scutes in the individual bands of 508 
individuals 
FREQUENCIES PER BAND 
NUMBER OF SCUTES 
1 | 2 3 4 5 6 7 8 9 
5 Meee en Pe OO) t |o a | 0) SOc ago aor oe 
HBr cee SU ee ee. (ae aes 5 1 4 2 0 0} 0 
56s Ca ener ae le ISe Oey | Mea al eas 3 ea 
Ly Reem NL Ns Tce he OF 4 267) a6y |) 20 ip 27 5 34) OA hae 
Cpe a ee a) 19 | 83-88 | 929) 58-41 a ie 
59 36° | 65. | 7d] 60" P70" aa 55 6 |aue 
60 Soe, Wane ee 7) 3) 102 |2f09) | 88" "116. |) 79 4) S40) 1G eS 
eee ey ae 7% || 86 [M04 |) 972, 80} GO, 1.49 mle TSP eet 
62ers. een ne Oi 12-88 - Ge i eo 96 | 85 | 53 | 63 
63.2 ans eee eee } $3: | 440 )040° | 61 |) 47°] «85 1025) 196" as 
Gtk CO creme Gl | 30. (95 | 86-7 1591s 57-4 So") “go, Boe 
Gy: cep aes eee 37 a W2e Gad | 17a ere Ger aia aaa 
66). 5.5 0 Beeler PRM Big 2h 5) 224 Dial 4 34a Ose 
GT 2 See ae yee PP comet BS: 1 2) 21 oye Nmeser 
GSc 5. eee 2 Oe a al 1 1 ae 28 
GON sive ee ee OF)! OAoa KOZ aro 3+) aaa | 56 
BO. dj. =2 oo ee 0 0 024/440 0 Ol. @ 2h 9 
hee IE dele eee 1 0 0 | 0 0 1 0 Br sions 
De 5 | 0.) 470 "0% | POM 0's tO emioenge tae a lsaat) 
73 0 0 OF 10 0 0 OF eee 
—— | 
