ちゃいろさなぎかいじゃなかったです
茶色蛹貝じゃなかったです
chairosanagikaijanakattadesu

Noun
Desu Copula

The polite, past negative form of ちゃいろさなぎがい

1. It wasn't a brown pupa shell.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana