246 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4tH Ser. 
to be a little smaller and to have the dorsal scales usually a little 
more regular in arrangement. 
Unfortunately no one of these distinctive characters is abso- 
lutely constant in all specimens. Thus No. 18441, a female 
from Kanshirei, has only one pore on each side although it 
is undoubtedly a 7. formosanus, as shown by the separation 
of the supraocular and superciliary, the position of the ear- 
stripe and the presence of the merest trace of a second pore 
on each side. . Nos. 18440, 18250, and 18238, all from Kan- 
shirei, are quite similar except that the second pores are a little 
more evident. In the whole series of two hundred and eighty- 
four specimens there are eight which show two pores on one 
side and only one on the other. (Nos. 18274, 18275, 18317, 
18330, 18356, 18360, 18376, 18378). Of these, all but two 
have the supraocular separated (Nos. 18356 and 18360), and 
all but one (18360) have the ear-stripe high. This last speci- 
men (No. 18360) is the only one which may occasion any 
doubt; all the others are 7. formosanus, as are one hundred 
and seventy specimens with two pores on each side. 
If now we examine the one hundred and seventy-eight ex- 
amples of 7. formosanus, the two-pored species, as regards the 
separation of the supraocular from the superciliary by granules 
and contrast our findings with the results of a similar exam- 
ination of one hundred and five specimens of the one-pored 
form, the value of this second character is strongly brought 
out. In the two-pored species the first large supraoculars are 
completely separated from the superciliaries by granules in one 
hundred and sixty-three specimens or 91.6%, while in the one- 
pored species this condition is found in only nine specimens or 
8.6%. Of the fourteen specimens of T. formosanus having 
supraoculars not completely separated, three show this con- 
dition only on one side of the head, three have them nearly 
separated on both sides, leaving less than 4.5% with complete 
contact as against 90.57% in the one-pored species. 
The difterence in position of the color-bands near the ear is 
very slight but none the less real. In 7. formosanus these 
markings are placed a little higher than in the other species, 
so that the lower edge of the light stripe does not extend below 
the lower margin of the ear-opening, as it does in the one-pored 
