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The Snakes of Europe

George Albert Boulenger

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Book Excerpt: 
. . . 141-169

Vipera aspis.

Snout simply turned up or produced into a small appendage, the raised portion with 5 or 6 (rarely 3) scales; rostral 11⁄2 to 2 times as deep as broad; ventrals: ♂ 125-146, ♀ 135-147

Vipera latastii.

Snout produced into an appendage covered with 10 to 20 scales; rostral not reaching the summit of the rostral appendage; ventrals: ♂ 133-161, ♀ 135-163

Vipera ammodytes.

28 γ. Snout not turned up at the end; supraocular narrow or broken up into several small shields; upper surface of head with small, usually keeled scales; two or three series of scales between the eye and the upper labials; scales in 23 to 27 rows, usually 25; ventrals: ♂ 151-177, ♀ 153-180

Vipera lebetina.

b. A pit between the nostril and the eye; upper surface of head with 9. . . Read More

Community Reviews

This is pretty dry -- a scientific rather than field guide description. The pictures were pretty good though and once you get the hang of the language, the descriptions are very accurate.