The Medieval Bestiary
Jaculus /jaculus/ 10X1.8 cm
The text about the jaculus, the snake jumping down from a tree on animals passing by, was taken from Isidor /XII.IV.29/ who used the writings by Pliny /VIII.23.35/ and Aelian /VI.18/ and quoted Lucan /Pharsalia, 18.720/. It is repeated by Pseudo-Hugh /111.46/ and Albert the Great /XXV.II.32/.