1066 MR. R. I. POCOCK ON 
ona level. The area of the sole between the plantar and digital 
pads is thickly hairy except for narrow naked streaks, visible 
when the hairs are parted, running forwards from the plantar 
pad towards the digital pads. The area behind or above the 
plantar pad is also covered with hair, except that in the fore foot 
there are two carpal pads, a larger (hypothenar) on the ulnar 
side of the middle line and a much smaller (thenar) on the radial 
side. These two carpal pads are separated by a considerable 
space from the plantar pad and by a very narrow hair-covered 
space from one another. The main portion of the plantar pad 
of both fore and hind feet is nearly bilaterally symmetrical, 
consisting of the three normal lobes corresponding to the four 
principal digits, but behind the inner lobe corresponding to the 
second digit there is an accessory lobe or pad corresponding to 
the first digit. The digital pads and the lobes of the plantar 
pads are concentrically striate, and the summits of the lobes of 
the plantar pad on the hind foot are crowned with a cluster of 
small close-set papillee *. 
In the particulars described above the feet of the two species 
are alike; but so far as the pads are concerned considerable 
differences may be noticed. The pads of JZ. foina may be de- 
scribed as normal in size; the digitals are broadly elliptical and 
a little longer than and nearly twice as wide as those of I. martes. 
a plantar and carpal pads also are larger and encroached upon 
by hair to a much lesser extent in J/, foina than in J/. martes. 
In the hind foot of J/. martes indeed the plantar pad may be 
said to be reduced to four striate tubercles joined by narrow 
strips of hairless, soft, unstriated integument. These differences 
are Shown in the figures and in the subjoined table of measure- 
ments (p. 1068). The smaller size of the pads in JS, martes makes 
the digits appear to be longer than in J. foina, but there does 
not seem to be actually any difference in this respect between the 
two species (text-fig. 4). 
The hair on the metatarsal area is much thicker and woollier 
in texture in J. martes than in M/. foina. 
Ido not suppose that the distinguishing points in the pads 
above pointed out will be found to be absolutely constant in all 
specimens of these two Martens from different localities and at 
all seasons of the year; but I strongly suspect that closely corre- 
sponding differences will prove to obtain between specimens 
collected in the same countries or latitudes at the same season of 
the year. It is possible that in both species the pads are more 
overgrown with hai in northern than in southern individuals, 
and in winter than in summer, These points have, I believe, 
yet to be worked out in detail. But it was that possibility I 
had in mind when stating that the examples I examined, all 
probably Central European, died upon the same day and had 
* Martens are prodigious jumpers, and the papillz on the plantar pads probably 
per iate the likelihood of slipping during their leaping pursuit of Squirrels through 
the trees. 
