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Show 1881.] LIZARDS OF SOCOTRA. 467 covered with smooth imbricate cross plates beneath. The fourth finger slightly exceeds the third; but the third toe is a little longer than the fourth. Head short and high, the scales on the anterior upper portion in front of the eye slightly convex, considerably larger than those on the trunk, and nearly equal to those beneath the tarsus. Scales around the nostril very little larger than the others above the snout. Nostril in contact with the rostral, which is nearly twice as broad as the other supralabials, and grooved above in the middle. Supra-labials on each side 6 to 9, the first 4 or 5 large, and those behind gradually diminishing in size. Three large lower labials in front on each side, and some small shields behind ; median infralabial larger and broader than the rostral. Ear-opening large, about the size of the first upper labial. Colour above earthy brown, with rather darker but indistinct cross bands and numerous red spots of irregular shape scattered over the back and sides ; lower parts paler, chin, throat, and breast mottled with brown. The following are the dimensions in inches :- Total length 5*8 Length from nose to anus 2*1 Head from orifice of ear to snout 0*53 Fore limb to end of fingers 1*1 Hand from wrist to end of fourth finger 0*42 Hind limb to end of toes 1*5 Foot to end of third toe 0*52 Only two specimens of this fine species of Gecko have been procured. EREMIAS (MESALINA) BALFOURI, sp. nov. E. ad E. pardalem affinis, parva, mediocriter gracilis, pede pos-teriore vix ante humerum attingente, scuto infraoculari ad labrum pertinente, supralabialibus 4 ante oculum; palpebra inferiore in medio translucente; regione supraorbitali ex duobus scutis majori-bus composita, granulis duntaxat extus marginata; collari ex squamis majoribus composito, ad latera libero, medio adha'rente ; scutis ventralibus in 10 series longitudinales ordinatis, extremas multo minores, sex medias majores, suba?quales; prceanali magna ; squamis dorsalibus rotundis, parvis, sine granis intervenientibus. Corpus superne longitudinaliter fasciatum, dorso medio pallide ru-fescente, lateribus fasciis alternantibus nigris pallidisque ornatis. General form rather stouter than that of E. pardalis, tail shorter, limbs shorter and stouter; the fore leg laid forward does not quite reach the end of the nose; the hind leg extends to the shoulder, or a little beyond. No palatal teeth. Lower eyelid with a translucent central disk more or less broken up into large plates; collar free at the sides, attached in the middle. Ventrals in longitudinal, not oblique rows. An enlarged prseanal plate. Nasal shields not very convex. The single praefrontal shield is not in contact with either the rostral or the vertical, being separated from the former by the upper nasals, and from the latter by the postfrontals. Superciliary disk nearly flat, and composed of two large |