Casting List<> of Derived class to List<> of base class

I have two classes: a base class (Animal) and a class deriving from it (Cat).Base class contains one virtual method Play that takes List as input parameter.Something like this

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication9
{
    class Animal
    {
        public virtual void Play(List<Animal> animal) { }
    }
    class Cat : Animal
    {
        public override void Play(List<Animal> animal)
        {
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            Cat cat = new Cat();
            cat.Play(new List<Cat>());
        }
    }
}

When i compile the above program,i get the following error

    Error    2    Argument 1: cannot convert from 'System.Collections.Generic.List' to 'System.Collections.Generic.List'

Is there anyway to accomplish this?