Webster's Revised Unabridged Dictionary · 1913

Specie

Specie , abl.

abl. of L. species sort, kind. Used in the phrase in specie, that is, in sort, in kind, in (its own) form.
“[The king] expects a return in specie from them” [i. e., kindness for kindness]. — Dryden
Collocations (1)
In specie (Law) , in precise or definite form; specifically; according to the exact terms; of the very thing.

Specie , noun

[Formed as a singular from species, in sense 5.]

Coin; hard money.