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Show 1906.] IN MEXICAN LIZARDS. 371 the typical C. tessellatus from Cedros Island, restricts the supposed differences of his C. multiscutatus to a mere individual variation. Further, a specimen (text-fig. 64 A ) obtained by Dr. Meek at El Paso fits exactly the C. tessellatus multiscutatus. Length 93 m m . Humerus with 7 to 8 scales ; femur with 7 ; pores 22/20. The throat and collar are pale blue, both with scattered jet-black spots. Chest white, with scattered black spots. Belly white to greenish yellow, here and there with half a black scale. Thighs below greenish yellow ; tail below with blackish spots. Dorsal surface of black ground-colour with 4 pairs of light stripes, of which the first is broken up into yellow spots and bars, while the others are partly broken and zigzag. On the shoulders and neck the general colour is grey with about six rows of black spots, while the last traces of the former pale stripes are completely lost. Thighs above and behind with large greenish-yellow spots on bluish ground. As a peculiarity I mention in this specimen the existence of three enlarged scales across the lower eyelid, exactly as those figured by Cope, p. 584, in tessellatus rubidus. The artist no doubt saw correctly, but the author does not mention this peculiar arrangement. CNEMIDOPHORUS MAXIMUS Cope. From Lower California: Cape St. Lucas, La Paz, and the little island of Espirito Santo. " The largest species of the genus "; Boulenger returns the largest as of 120 m m. Humeral rows 4-5 in Cope's key, p. 568, but in the text, p. 571, are stated 6-8. Anterior surface of forearm with 4 rows ; posterior surface granular, but according to the figure with slightly enlarged granules on mid-arm. Femur with 7 rows; but in the figure I should certainly count 9. Pores 24-25; in the figure only 21 or 22. The young are said to have a median light stripe and two paired stripes on blackish ground. Each of the fields with two rows of pale spots. The adult are olive-brown with three brown stripes on each side as broad as the fields, " and so broken by spots of the ground-colour as to resemble series of confluent brown variations." " Gular region blackish varied ; abdominal shields black-tipped." Apparently these specimens from the southern part of Lower California constitute a large, coarsely marbled, and rather dull-coloured race of C. tessellatus. CNEMIDOPHORUS RUBIDUS Cope. From S. Margarita Island, West Coast of Lower California. Length 100 m m . Humeral rows 5-6; femoral rows 8-9 Pores 22. The young have traces of six stripes on light brown ground, and the fields are cross-barred with olive and black, as in the adult of C. gularis mariarum. PROC. ZOOL. Soc-1906, VOL. I. No. XXV. 25 |