342 TED. 
anterior part of the back; females sometimes with a second light 
line along the side; males with light spots on the flanks; lower 
surfaces light olive. 
milim * millim. 
Total length ............ 291 253 
Head wnt ae einen es 26 22 
Width of head .......... 16 12 
Body 7 ecw ota sees 65 61 
Fore limb ...66.4. eases 35 34 
Hind limb.............. 67 65 
od ae ea ne 200 170 
South America. 
a-b, BQ. Demerara Falls. 
ec Q. Cayaria, E, Peru. Messrs. Veitch [P.]. 
de SQ. Sarayacu, Peru. Messrs. Veitch ted 
4. Centropyx pelviceps. 
Centropyx pelviceps, Cope, Proc. Ac. Philad. 1868, p. 98. 
—— dorsalis, O’Shaughn. Proc. Zool, Soc. 1881, p. 228. 
Very closely allied to the preceding. The occipital concavity is 
stronger ; the temporal granules and lower femoral scales larger ; 
femoral pores nineteen to twenty-two. Preeanal scales in both sexes 
keeled. Dark olive above, with a pale light median band com- 
mencing on the snout and gradually disappearing on the back ; this 
band bordered on each side by a broad festooned black band breaking 
up into spots on the hind part of the back; lower surfaces pale 
green. 
drs millim 
Total length ............ 343 348 
Head icin aise eweeuate 31 31 
Width of head .......... 18 18 
BOW! sii sauds une seats 82 87 
Fore limb .............. 45 50 
Hind limb .............. 88 91 
Tail se dxoninaeieenasce Faas 230 230 
Ecuador; N. Peru. 
a-b, 9. Canelos, Ecuador. Mr. Buckley [C.]. 
ad. dQ. Peruvian Amazon. Mr. E. Bartlett, fey 
fi. Xe oe (Stated to be the type of Monoplocus dorsalis.) 
5. Centropyx altamazonicus. 
a) a altamazonicus, Cope, Journ. Ac. Philad. (2) viii. 1876, 
p. 162. 
Dorsal scales very small, hexagonal, smooth, but little larger than 
the lateral. Ventrals keeled, in sixteen longitudinal and thirty-five 
