WWW.assetBundle

public AssetBundle assetBundle ;

Description

Streams an AssetBundle that can contain any kind of asset from the project folder.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    IEnumerator Start()
    {
        WWW www = new WWW("http://myserver/myBundle.unity3d");
        yield return www;

        // Get the designated main asset and instantiate it.
        Instantiate(www.assetBundle.mainAsset);
    }
}

See Also: AssetBundle class.