12. ALOPoGLossus. 385 
bordered above ; from nape to tail a median series of small black 
spots ; head brown; throat yellow. 
millim. millim. 
Total length (tail re- From end of snout 
produced) ...... 115 to axilla ...... 21 
Length of head to From end of snout 
CE Hoare eae ere see 11 to vent ........ 50 
Width of head .... 85 Hind limb........ 23 
Upper Amazons, 
3. Alopoglossus buckleyi. 
Leposoma buckleyi, O'Shaughn. Proc. Zool. Soc. 1881, p. 233, pl. xxii. 
tig. 2%, 
Differs from A. copii in the fcllowing points:—Suture between 
the prefrontals extremely short; parietals and interparietal with 
longitudinal ridges; all three pairs of chin-shields in contact ; gular, 
ventral, and preanal scales smooth ; dorsal scales much narrower ; 
twenty-nine scales round the body; thirty-one scales from occiput 
to sacrum inclusively, and twenty-eight from gulars to preanals. 
Femoral pores fourteen. Caudal keels weaker, not forming such 
regular ridges. Upper surfaces pale brown, with a longitudinal 
row of black spots on middle of back; a light lateral stripe from the 
supraorbital angle, along the parietal border and extreme edge of the 
dorsal surface, to the tail ; sides of body black, variegated with blue 
or yellowish spots on the neck; entire mental region yellowish, 
without spots; a dark coloration predominates over the whole 
inferior surface of the throat, of the body, limbs, and tail, the 
scales being blackish at their root or for half their length, and 
yellowish at the tips. 
millim. millim. 
Total length (tail re- From end of snout 
produced) ...... 115 to vent ........ 51 
Head oye a hee ae 12 Fore limb ........ 16 
Width of head .... 8 Hind limb........ 23 
From end of snout 
to forelimb .... 21 
Ecuador. 
aod. Canelos. Mr. Buckley [C.j. (Type.) 
* The description is incorrect, owing to the imperfect state of preservation 
of the unique specimen. The epidermis has come off in many places, and 
the shape of the scales has changed ; this explains the sudden modification of 
the pectoral into the ventral scales, the former being intact, the latter deprived 
of the epidermis. 
VOL. II. 2¢ 
