136 Bulletin of Laboratories of Denison University [Voi. xi. 
rows of dark spots edged with lemon yellow, bright yellow 
patch on shoulder; narrow white median dorsal line; 66 rows 
of scales on belly; long series of femoral pores nearly meeting 
in front of anus; two groups of slender spines behind the 
tympanum. 
There are four rows of black spots on the back; each spot 
bordered by strips of white and yellow; space between the 
spots ocheraceous; tail with six double rows of black spots; 
underneath white often mottled with numerous black splotches. 
Measurements of large individuals. 
Length to anus. 
100 mm. 
80 mm. 
42-100 mm, 
Length of tail, 
31 “ 
30 
( i 
0 
1 
Snout to ear. 
28 “ 
20 
( ( 
10-21 “ 
Width of head. 
30 
24 
t ( 
12-27 “ 
Length of occipital spine. 
4 “ 
2 
i ( 
I- 2 “ 
Length of fore leg. 
42.5 “ 
32 
18- 35 “ 
Length of hind leg. 
56 “ 
43 
< ( 
23- 45 “ 
Base of fifth to end of fourth toe. 
. 14 “ 
12 
( ( 
7- 15 “ 
Coloration of specimen from San Pedro mountain at 7000 
feet. Upper surface of head mottled with brown and white; 
six pairs of Vandyke to umber brown blotches on neck and 
body, the two middle pairs double as by confluence of two, 
spots bordered behind by a dark band shading into brown, this 
still bounded posteriorly by a narrow band of brilliant orange; 
intervals between spots irregularly shaded with orange, yellow 
and brown; numerous white spots on the side; irregular gray 
bands on either side the median line; tail with seven dark bands, 
belly burnt sienna with numerous small dark spots, whitish on 
sides with brown bands and spots. 
Sp. 3- PhrynosoTYia PlatyrJiynus, Girard. 
Plate XX^ Fig. i8. 
This species is excessively abundant in the valley of the 
Rio Grande and elsewhere at lower levels in the eastern part of 
the territory. It is rarely seen of a large size and is greatly 
exposed to the attacks of its enemies though it possesses the 
power of changing color to a greater extent than the others. 
