Correlation and Variation in the Toad 



581 



TABLE I 



Means and standard deviations of all characters 



Mean 



Standard deviation 



c?n=i73 I 9 n=z52 j d''n=i73 ? 11 = 252 



Total weight, grams I 33.540^10 



Total length, mm 160.405^0 



Lengthof body, mm I 6.7.87i±o 



Length of thigh, mm 29 . 575J1 o 



Length of shank, mm | 23 . 020ib o 



Length of foot, mm I 40.840±o 



Length of leg, mm i 92 . 8 1 2i o 



Lengthof head, mm I i8.ooo±o 



Width of mouth, mm ! 23 . 202± o 



j 

 Lengthof alimentary canal, mm . . . 353 -873^: i 



Weight of gastrocnemii, decigrams.. 6.832^0 



Weigtit of liver, grams i i . 590J1 o 



Weight of ovaries, grams I 



3641 52- 

 Si8!i83. 

 78. 



309 105 



045 



074 

 779 



26 

 429 

 0861 10 



027 2 



I S 



560^0.617 

 690^0.628 



II3±0.292! 



.690^0.098 

 .325± 0.094 

 .5o6±o.i55 



.99o±o-3SS 

 • 052±o.o5i 

 .6501b 0.087 

 .6o3db2.253| 

 .635±o.i3i: 

 .233±o.o34 

 .253zh 0.209 



7.io5±o.257 

 10.1071to.365 



4-3i9±o-iS6 

 i-970±o.07i 

 i.56o±o.o56 

 2.594±o.094 

 6.035±o.2i8 

 o.872ibo.032 

 i.437±o.o52 

 34.670i1.255 

 1 .673it 0.060 

 o.530±o.oi9 



14.526io.436 



i4-783ibo.444 



6.877±o.207 



2.538±o.o76 



2.224±0.o67 



3.657ito.iio 

 8.359±o.25i 

 1 .205iho.036 

 2 . 044i o . 06 1 



S3.0181b1.593 

 3.o77±o.o92 

 o.794rb 0.024 

 2.795±o.i45 



TABLE II 



Coefficients of variability 



(^n=i73 

 C E, 



9 0=252 

 C E^ 



Total weight 



Total length 



Length of body 



Length of thigh 



Length of shank 



Lengthof foot 



Lengthof leg 



Length of head 



Width of mouth . 



Length of alimentary cana 

 Weight of gastrocnemii . . 



Weight of liver 



Weight of ovaries 



2i.i8±o.8o 

 6.30ibo.23 

 6.36±o.23 

 6.66±o.24 

 6.78±o.25 

 6.35±o.23 

 6. 501b 0.24 

 4.82zbo.i7 



6.20±0.22 



9.8iibo.36 

 24.50io.94 

 33-34±i.33 



27.64io.89 

 8.o5±o.24 

 8.8o±o.27 



7-53±o-^3 

 8.45±o.25 

 7.86±o.24 

 7.89±o.24 

 6.oi±o.i8 

 7.67ibo.23 

 12.341bo.38 

 28.941bo.94 

 33.55i1.20 

 53.23zb3.39 



These tables show several facts of interest. First, the absolute 

 distinctness of the male and female series as regards size, the female 

 showing the larger values in every character measured. On the 



whole the female is about 24 per cent larger than the male, the actual 



