Marx's class definitions

[Kenco Smooth]

Ok so I have a decent understanding of the basis of Marx' theories on class but I could do with some clarification on the finer aspects. I'm aware of the proletariat, bourgeoisie, Petit-bourgeoisie and the Lumpenproletariat (one word?).

So the Bourgeoisie control the means of production and attain wealth through the accumulation of capital. The proletariat hire their labour out to the bourgeoisie in return for a wage. Here's where I get a bit fuzzy on the details so any clarification would be nice.

[Broletariat]

Don't forget the Peasantry too.

The Bourgeoisie like you said own the means of production and create capital through the hiring of wage-slaves and the like

The Proletariat is hired by the Bourgeoisie like you said.

Petit-bourgeoisie is just smaller version of the Bourgeoisie, and the Peasantry is the landed class that owns land but works it for themselves, mostly farmers and the like.

[AK]

Petit-bourgeoisie is just smaller version of the Bourgeoisie, and the Peasantry is the landed class that owns land but works it for themselves, mostly farmers and the like.
Farm workers, are in a way proletarian, are they not? Same with normal farmers, they sound petit-bourgeois to me.

[ArrowLance]

Farm workers, are in a way proletarian, are they not? Same with normal farmers, they sound petit-bourgeois to me.

The peasant is much different from the proletariat in that they do not get their pay in wages as much as in land. They are non petit-bourgeois because in general they do not labour outside their family.

[AK]

The peasant is much different from the proletariat in that they do not get their pay in wages as much as in land. They are non petit-bourgeois because in general they do not labour outside their family.
I get fucking confused when it comes to the peasantry. Could you give me a clear definiton as to how the peasantry (and farm workers, if they do indeed constitute a seperate class) is defined and how they're different from, say, the petit-bourgeoisie?