What's "red leech" here?

Solution 1:

There is a reference to the red leech in The New Yorker May 24, 1952 Issue.

According to Prof. John Percy Moore, of the Univ. of Peen., who is one of the worlds outstanding authority on leeches, this creature occasionall slips into the nasal passage and lodges in one of the ethmoid sinuses. Grows to enormous size there, and it's just possible it could kill a man. When withdrawn by forceps from the body on which it feeds, it would normally appear drenched in its victims blood.

Including its typos.