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Show 1892.] AND B A T R A C H I A N S F R O M B A R B A R Y . 17 described by Mr. Boulenger had never more than 30. The specimens from Duirat are all marked with white ocelli or shafts in black spots, the general colour of the upper surface varying from dark brown to dark grey, without any trace of the broad dorsal band of a darker hue which occurs in all the Biskra specimens, none of which are of a grey tint. In some specimens from Biskra the ocelli are practically absent or only obscurely indicated. 19 a. var. TILIGUGU, Gmelin. 1, Tlemgen, Province of Oran ; 1, Mount Santa Cruz, Oran ; 1, H a m m a m R'irha, Province of Algiers; 2, H a m m a m Meskoutine, Province of Constantine ; and 3, Duirat, Tunisia. These specimens are stouter than the previous form and larger, reaching 144 millim. from the snout to the vent. The limbs also are longer, as in one individual measuring 105 millim. from the snout to the vent the hind limb is 29 millim. The scales round the body vary from 30-32. In all of them there is a broad dorsal band with a lighter-coloured broad band on either side of it, and all are ocellated. The Duirat specimens are much paler than those from the Tell. 20. CHALCIDES BOULENGERI, sp. nov. (Plate I. figs. 1, 2,3.) 2 specimens, Duirat, Tunisia. Snout wedge-shaped, not so broad as in C. sepoides, Audouin, but with a projecting labial edge ; eye small, but slightly larger than in C. sepoides ; ear-opening an oblique slit at the commissure of the mouth, but with a fringe of three pointed scales. The nostril is not in advance of the suture between the rostral and the first labial; supranasals fused into a single shield ; frontal as broad or a little broader than long; four supraoculars, with four small scales below them ; fifth labial enters the orbit. The limbs are weak, but stronger than in C. sepoides; the hinder pair are proportionally more developed than the front limbs. The hind limbs are penta- or tetra-dactyle, and in length each equals about the distance between the fore limb and the nostril; the latter limb equals considerably more than half its distance from the centre of the eye, and is pentadactyle1. The body is not quite so long as in C. sepoides, and the sides are angular as in that species. Twenty-eight rows of scales round the body. Yellowish above, each scale finely margined with dark brown, their centres whitish and presenting, in some instances, the appearance of ocelli, recalling the ocellation characteristic of C. ocellatus, and this is unmistakably marked especially on the tail, on which the ocelli are arranged in more or less transverse rows. A black line through the eye, and two fine black lines on either side of the frontal. The 1 In one specimen the mames is entirely absent on one side, but this is probably due to an accident. PRJC. ZOOL. SOC-1892, No. II. 2 |
