ちゃいろさなぎかいでしょう
茶色蛹貝でしょう
chairosanagikaideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of ちゃいろさなぎがい

1. Probably a brown pupa shell.

Polite
Presumptive
Conjecture
Usually Written in Kana