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Show 12 DR. J. ANDERSON ON MAMMALS, REPTILES, [Jail. 5, The largest female measures from the snout to the vent 94 millim., and the tail 125 millim. These specimens illustrate the unequal lepidosis of the back mentioned by Mr. Boulenger, as no two are alike in the distribution of the enlarged scales. The Duirat specimens collected in the months of M a y and June are gravid. Genus UROMASTIX, Merrem. 4. U R O M A S T I X A C A N T H I N U R U S , Bell; Boulenger, loc. cit. p. 119. 2, Biskra ; 2, Duirat. Family III. VARANIDTE. Genus V A R A N us, Merrem. 5. V A R A N U S GRISEUS, Daudin ; Boulenger, loc. cit. p. 121. 1 2 > Duirat, Tunisia. Mr. Boulenger gives the dimensions of this species as follows :- snout to vent 56 centim., tail 71 ; but this female, although it is 22 centimetres shorter in its body, is gravid, having 7 ova in the right, and 8 in the left ovary, the ova on the right side being pressed forwards almost as far as the axilla. Family IV. AMPHISB^ENID^E. Genus T R O G O N O P H I S , Kaup. 6. T R O G O N O P H I S W I E G M A N N I , Kaup ; Boulenger, loc. cit. p. 122. 2, H a m m a m Meskoutine, Province of Constantine, under large stones on hill-sides. Family V. LACERTID^E. Genus .LACERTA, Linnseus. 7. L A C E R T A OCELLATA, Daudin ; Boulenger, loc. cit. p. 123. Var. P A T E R , Lataste, 1880 ; Boulenger, loc. cit. p. 123. 2 d, under hedges by the road-side, Tlemsen, Province of Oran • I 2 ? under a large stone, H a m m a m Meskoutine, Province of Constantine ; 2 <5 & 2 2 > Duirat, Tunisia. M . Lataste was the first to point out that the large lizard of Algeria and Tunisia was a race or subspecies of L. ocellata, closely related to it, but having also some points of affinitv with L. viridis. Mr. Boulenger adopts this view, with which I fully agree, and in his catalogue he clearly indicates wherein it differs from the European form. In none of these specimens does the number of scales across the back exceed 80, nor are the femoral pores more than 16. 7a. var. T A N G I T A N A , Boulenger, Catalogue of Lizards in the |