I’m (finally) reading The Origin of Species, and came across this comment:
So again with the varieties of sheep: it has been asserted that certain mountain-varieties will starve out other mountain-varieties, so that they cannot be kept together. The same result has followed from keeping together different varieties of the medicinal leech.
That’s something I had never thought about before – how are medicinal leeches kept when they are not used? Do they each have their own little velvet-lined1 box? Or are they instead stuffed together in a plastic bag, and when one is needed, the doctor just puts some forceps in and grabs the nearest?
Google, as always, is our friend. The book Medicinal Leech Therapy tells us “that there are special containers for leech storage, and even a company in Germany that makes them. For long-term storage, they need stones with sharp edges to help with moulting.
I feel there is hope for mankind in this – despite everything that goes on in the world, someone still feels sees the need to provide housing for as surprising a beast as a leech.
1 I guess a vervet-lined box might be more to their liking.