Scales that surround the nostrils of snakes
From Wikipedia, the free encyclopedia
In snakes, the internasal scales are those on top of the head between the scales that surround the nostrils.[1] They are usually paired and situated just behind the rostral.[2]
Wright AH, Wright AA (1957). Handbook of Snakes of the United States and Canada. Ithaca and London: Comstock Publishing Associates. (7th printing, 1985). 1,105 pp. (in two volumes). ISBN0-8014-0463-0.
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