27. TROPIDURUS. 175 
millim. millim. 
Total length ...... 370 Fore limb ........ 65 
Head ee os arenas 29 Hind limb........ 112 
Width of head .... 26 Tall gsacaeaee .. 230 
Body: saves snes . 111 
Peru ; Chili. 
A. Upper surfaces blackish-olive, more or less abundantly dotted 
with pale olive, with or without a black lateral band; lower 
surfaces bluish or greenish grey; throat and chest black or 
blackish. 
a-b. Ss. On rocks at Pescadores Bay. Mr. H. Whitely (C.]. 
ce-e. g & her. On rocks near Yslay. Mr. H. Whitely [C.]. 
f-g. Yg. Peru. C. Darwin, Esq. [P.]. 
B. Dark olive above, hind limbs with whitish spots; a white band, 
as long as the femur, on each side in front of the hind limb ; 
lower surfaces white, gular region with black angular bands 
pointing backwards. 
hk, Yg. Peru. Smithsonian Institution [P.}. 
C. Yellowish grey or olive above, with yellowish or pale olive dots 
and black cross lines or reticulations; lower surfaces dirty 
white, belly sometimes black ; throat with black angular bands 
pointing backwards; chest black or with black cross bands. 
i,k,l. 3 & hg. Peru. 
m. os Chili 
n-p. & & her. —? Sir A. Smith [P.]. 
D. Pale olive-grey, vertebral line lighter; back with transverse 
blackish spots or cross bands, sometimes reticulated; limbs 
with blackish cross bands; lower surfaces whitish, throat and 
sides of neck with round black spots. 
gr. od & yg. Near Lima. Prof. W. Nation [P.]. 
8. od. Lima. J. M. Cowper, Esq. [P.]. 
t. Her. dS Peru. 
6. Tropidurus spinulosus. 
Microlophus spinulosus, Cope, Proc, Ac. Philad. 1862, p. 351. 
Leiocephalus (Craniopeltis) variegatus, O’Skaughn. Ann. § Mag. 
N. H. (5) iv. 1879, p. 801. 
Tropidurus (Microlophus) spinulosus, Boettg. Zeitschr. f. Naturw. 
lviii. 1885, p. 216. 
Upper head-scales smooth, convex ; a series of four or five feebly 
dilated transverse supraoculars ; occipital a little longer than broad, 
narrower than the supraocular region ; temporal scales conical; a 
group of small erect spine-like scales in front of the ear. A strong, 
slightly curved antehumeral fold, nearly meeting its fellow on the 
throat; a strong transverse fold in front of the latter, forming a 
