Obviously a standard knife bayonet, and a cruciform bayonet, and a barreled receiver for a rifle.
Possibly an early Mauser style bayonet, based on the short angled pommel.
Barreled receiver possibly a Arisaka Type 38.
Cruciform bayonet....? Can't see enough of the socket to see if it has provisions for a locking ring, or the type of slot/mortise it has. These traits can help in IDing it.
What country were these found?
Below is a shot of the receiver on my Type 38 Arisaka, notice the similar slot for the bolt. Not finding any Mausers, Mannlichers, Carcanos, Enfields, Springfields, Remington, Krags, etc with this slot yet. Plus it's definitely not a Mosin Nagant.
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Here's a bayonet from my Yugoslavia M48 Mauser. Notice the angled pommel. Early German, Belgium, Yugoslavia, and Czechoslovakian bayonets had the same short angled pommel.
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