732 THE AMERICAN NATURALIST. (VoL. XXXIII. 
case of the feet than in the case of the hands, as might be 
expected from the poorer development of the mounds upon the 
foetal palm. 
The ulnar-fibular pattern is remarkable not only for the fact 
that it is the only one of the four metatarso-phalangeal patterns 
which occurs less frequently in the feet than in the hands, but 
also for the fact that of these four “ centers ” it is the only one 
which occurs more frequently in the female than the male, as 
the following table shows. 
CASES IN | CASES IN 
100 MA | 100 FEMALE 
ANDS HAnps, 
Thenar . ee 12 | 5 
Racial tibia ee Y 9 4 
staeto 75 | 54 
pare ay ce 25 | 40 
Hypothenar!. . . 2 | 37 
Iam under great obligations to Dr. C. B. Davenport, for sug- 
gestions and criticisms ; to Professor C. Sedgwick Minot, for 
kindness in allowing me to examine his collection of foetuses 
Fic. 4. — Cross-section of the right hind foot of a cat fœtus in region of the Anlage of the 
walking pad. Section 195 B 109 in Harvard nor pg Roman numerals = meta- 
tarsal bones. Arabic ies = number of mo 
and to section the feet figured, and for suggestions and criti- 
cism; to Professor H. H. Wilder, for the use of a series of 
footprints ; and to Dr. J. A. Blake, for permission to examine 
the collection of foetuses of Columbia University. 
` 1 The hypothenar pattern is one not in the metatarso-phalangeal series. See 
Figs. 5 and 6. 
