Shylock's Gender: Jewish Male Menstruation in Early Modern England

So a while back, XGH posted about a renowned rabbi contending that Jews have a different number of teeth than gentiles. Unsurprisingly, the notion that Jews and Gentiles are physically different has been reciprocated by the non-Jewish side as well.

Unfortunately I don't have access to JSTOR - I am dying to figure out what the connection is to Shylock in this article!