OCR Text |
Show 246 MR. G. A. BOULENGER ON [June 6, three; loreal rows five; six upper labials to below the centre of the eye; ear-opening rather small, vertically oval. Gular appendage very large, extending far back on the breast, in the male, absent in the female ; gular scales feebly keeled. Body feebly compressed ; no dorso-nuchal fold. Dorsal scales subrhomboidal, subimbricate, strongly keeled, passing gradually into the minute, granular scales of the sides; ventrals much larger than dorsals, rounded, imbricate, smooth. The adpressed hind limb reaches the eye or a litte beyond; digits moderately dilated; 16 lamellae under phalanges II and III of the fourth toe. Tail scarcely compressed, twice as long as head and body. Male with enlarged postanal scales. Reddish brown above, with a paler broad vertebral stripe, widening on the nape ; this stripe edged with dark brown in the female; lower parts golden, the gular appendage bright red. Total length ....... 150 millim. Fore limb....... 23 millim. Head................... 16 ,, Hind limb ... 37 ,, Width of head... 10 ,, Tail ............... 100 ,, Body................... 34 „ Two specimens, male and female, from Omilteme, Guerrero, 7600 ft. The male is remarkable in the absence of the inner digit on the four limbs. Allied to A. nebulosus Wiegm. Distinguished principally by the smooth ventral scales. SCELOPOROS g a d o v l e . (Plate VII. fig. 1.) Head-shields smooth; frontal transversely divided, separated from the interparietal by a pair of frontoparietals; interparietal as long as broad ; parietals small, one pair on each side ; two canthnl scales; five or six large transverse supraoculars, bordered inwards by one series of scales, outwards by one or two; five long pointed scales form a strong denticulation in front of the ear. Dorsal scales larger than ventrals, strongly keeled, pointed or shortly mucronate, forming oblique series converging towards the median line, passing gradually into the smaller scales of the sides; 73 to 77 scales between the interparietal shield and the base of the tail; 19 or 20 scales, taken in the middle of the back, correspond to the length of the shielded part of the head. Ventral scales small, smooth, bicuspid. 75 to 80 scales round the middle of the body. The adpressed hind limb reaches the ear; tibia as long as the distance between the end of the snout and the ear; the distance between the base of the fifth toe and the extremity of the fourth exceeds the distance between the end of the snout and the posterior border of the ear. 28 to 33 femoral pores on each side, the two series narrowly separated on the praeanal region. Tail compressed; caudal scales a little larger than dorsals, strongly keeled, the two median upper series more strongly mucronate and forming a pair of serrated ridges. Male with slightly enlarged postanal scales. Greyish olive above, reddish on the sides, dotted with bluish |