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Show 316 DR. If. GADOW ON EVOLUTION [Mar. 20, specimens with only 8 white stripes and with a narrow uniformly darker centre are very rare. (2) The scarcity of black on the collar and throat of the males ; only in 6 males was the collar black or inclining to black, although in one adult male from Tequesixtlan the whole throat was blue and partly suffused with black from the collar upwards. (3) Tendency of stripe 1 and even of stripe 2 to break up into beads, and the appearance, advancing with age, of white spots in field I. and in the lateral field, so that one or two additional lines of beads may be developed in this lateral field. This breaking up of the first stripe into beads occurs also in some few specimens of Tierra Colorada, and in one of the 7-striped specimens from San Luis. Vera Cruz, near the seashore : 7 specimens collected by Dr. Meek. 1 with 8 stripes, 5 with 9 stripes ; and in a young specimen the central, 5th stripe, is restricted to the nape and neck. Throat and collar not black. Las Peuas, Jcdisco, near the seashore : 4 specimens collected by Dr. Buller, Brit. Mus. 1 very young specimen of 33 mm.; with 10 stripes, and with an additional faint line on the flanks. 1 $ of 45 mm.; with 10 stripes, and with an additional weak line. 1 5 of 54 m m . ; with 9 stripes, and with a stronger line. 1 (5* of 65 m m . ; with 9 stripes; with two additional long lines of white beads; moreover stripes 3 and 4 are dissolved into beady lines. Throat and collar black, abdomen blue. Colima.--Cope's description of Cnemidophorus lineatissimus, Proc. Amer. Phil. Soc. 1877, p. 94. Black, with 10 or 11 pale bands, sides and femora pale-spotted ; throat black. This and the rest of his description refer obviously to 10- or 11-striped male specimens of C. deppei, resembling some of those of Oaxaca and Las Penas in Jalisco. Cope gives "Guadalajara" as another locality, a very doubtful statement. The plain of Guadalajara, with its elevation of more than 5000 feet, is absolutely above the range of G. deppei and C. immutabilis, which are essentially hot-country species; but it is possible that Cope's specimens came from the barranca, through which flows the Rio Santiago, a few hours' ride from the town, and 2000 feet lower than the surrounding plateau.-Bocourt, Miss. Scient. Mex., described two specimens from " Colima," with 9 stripes. CNEMIDOPHORUS DEPPEI, var. COZUMELA. 4 specimens from the island of Cozumel, East Coast of Yucatan. British Museum. Length 64-71 mm.; the largest specimen is gravid. Collar like that of C. deppei. Supraoculars : one with 3/3; two with 3 left, right posterior very small; one with 4/4, the posterior very small. In this respect resembling some of the C. deppei of South Guerrero. |