Guo Pu
The bestiary's fifth book, "Classic of the Central Mountains" records the presence of "jiao" in the Kuang River (, "River Grant") and Lun River (, "River Ripple") . Guo Pu (d. 324)'s commentary to Part XI glosses "jiao" as "a type of ["long" ] dragon that resembles a four-legged snake" (: 378). Guo adds that the "jiao" possesses a "small head and a narrow neck with a white goiter" and that it is oviparous, and "large ones were more than ten arm spans in width and could swallow a person whole".