Bencao gangmu
Eberhard equates the "shàn" with the "jiaolong" "flood dragon; crocodile" and compares tales of both these dragons attacking cattle in rivers. The 1596 "Compendium of Materia Medica" describes the "shèn" under the "jiaolong" entry with quotes from the "Yueling" and Lu Dian's "Piya".