Sauvages has given us five ſpecies, which Dr. Cullen thus divides. The true ſpecies are the paralytic and gonorrhoic—the ſpurious ſpecies, or where impediments occur to prevent the act, from piles, or ſome fault in the urethra; what is called falſe or fictitious, that is, ſuppoſed to ariſe from magic.