English: An 1875 illustration of the Qinghai Lake naked carp, en:Gymnocypris przewalskii, formerly called Schizopygopsis przewalskii.
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From p. 877 of the 1875 book "Монголія и страна Тангутовъ, трехлѣтнее путешествіе въ Восточной Нагорной Азіи" (English title "Mongolia, the Tangut country, and the solitudes of northern Tibet"), by en:Nikolay Przhevalsky. Uploaded by the British Library to Flickr here.
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