OCR Text |
Show 1906.] IN MEXICAN LIZARDS. 357 whole thigh; towards the shoulders they become scarcer, and further forwards they disappear, while faint traces of the original pale stripes 1 and 2 remain visible. In very old specimens the spots are small and irregular, restricted to the lower back, rump, and thighs, the rest of the back being spotless brown with a warm reddish tint. Text-fig. 80. Cnemidophorus bocourti from Oaxaca. There is no doubt that the original stripes become dull and merge into the ground-colour, whilst new spots of pale tissue develop in these stripes, and a row of equally numerous spots is developed in each field and below stripe 1. The spots remain small and do not become confluent. The evolution of the pattern is the same as that of C. communis in general, but it also recalls C. guttatus. Structurally, however, C. bocourti forms the very 24* |