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8

American Snakes together with their variations." 

[[underlined]] E. D. Cope. [[/underlined]] Color Pattern in Cnemidophorus.
[[underlined]] Amer. Natural., XXV, 1891, pp. 1135-1136.
The longitudinally striped pattern shown to pass into a transversely banded form.

[[underlined]] E. D. Cope. [[/underlined]] - Parallel Color-Patterns in Lizards.
[[underlined]] Amer. Natural., [[/underlined]] XXVI, 1892, p. 522, pl. xviii.
Calls attention to the parallelism of pattern development in [[underlined]] Lacerta [[/underlined]] and [[underlined]] Cnemidophorus. [[/underlined]]