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Show 464 MR. W. T. BLANFORD ON THE [Apr. 5, 4. Notes on the Lizards collected in Socotra by Prof. I. Bayley Balfour. By W . T. BLANFORD, F.R.S., F.Z.S. [Received April 1, 1881.] (Plate XLII.) The Lizards collected in Socotra by Dr. Balfour belong to six species, three of which appear to be undescribed. The species are Chameleon monachus, Hemidactylus homaolepis, sp. nov., Pristurus rupestris, P. insignis, sp. nov., Eremias (Mesalina) balfouri, sp. nov., and Euprepes perrotteti, var. I add some remarks on these species, with descriptions of the new forms. CHAMELEON MONACHUS, Gray, P. Z. S. 1864, p. 470, pl.xxxi. Nine specimens brought. None are so large as the type, nor are the occipital lobes in any so much developed ; but in all other details of structure the correspondence is exact. The original type of this species in the British Museum was received from this Society in 1855, with the locality Madagascar. This locality, after the discovery of the same Lizard in Socotra, must be considered doubtful. Nothing is more probable than that Chamseleons, which live well in captivity, should be transported alive from one African island to another. HEMIDACTYLUS (LIURUS) HOMCEOLEPIS, sp. nov. (Plate XLII. fig. 2.) H. parvus, squamis subcequalibus undique indutus, sine tuberculis majoribus ; cauda rotundata, haud verticillata ; unguibus minutis; poris inguinalibus paucis, femoralibus nullis ; scutis supralabi-alibus 8, infralabialibus "/'. Body and tail covered with small scales without any tubercles. Last joint of thumb present; all claws very minute, that of the thumb especially. Tail rounded, not verticillate. Four inguinal pores in the only male examined; they are arranged in a curve with the convexity directed forwards ; no femoral pores. Eight upper and seven lower labials. Ear-orifice about the size of one of the hinder upper labials. The flat rounded subgranular scales covering the trunk are sub-equal in size, but in the middle of the back they are rather smaller than on the sides. Those on the occiput are very small; on the nose they are rather larger and more convex. Scales of the abdomen small, no larger than those on the sides, and passing so gradually into the latter that it is impossible to count the number exactly ; but there are more than 40 across the belly. Transverse lamellse 5 or 6 beneath the thumb and first toe, 7 to 9 beneath the other digits, the proximal two or three on each digit being undivided. The scales above the tail and on its sides are about the same size as those on the back, and are arranged in not very distinct rings, each composed of a single row of scales ; there is no division into segmental verticils as in most species of Hemidactylus. A row |