Shakespeare's basset hound?

I'm convinced that this passage from A Midsummer Night's Dream is describing basset hounds, whether Shakespeare knew it or not:

Theseus:
My hounds are bred out of the Spartan kind:
So flewed, so sanded, and their heads are hung
With ears that sweep away the morning dew;
Crook-kneed, and dewlapped like Thessalian bulls;
Slow in pursuit, but matched in mouth like bells,
Each under each. A cry more tuneable
Was never holloed to nor cheered with horn
In Crete, in Sparta, nor in Thessaly.