That's the one -- Lon Chaney Jr. as Lawrence Talbot, the definitive screen wolfman. Almost all the werewolf lore in that movie, such as wolfsbane blooming and the pentagram seen in the next victim's hand, was invented by screenwriter Curt Siodmak -- and yet it's become part of "what everybody knows" about werewolves.

There's a novelette by SF/fantasy writer Harlan Ellison called "Adrift Just Off the Islets of Langerhans," in which Larry Talbot is featured. His name is never given, but it's clear who he is, especially in one scene where we see the old gypsy woman's mantra, "The way you walk is thorny, my son, through no fault of your own," pasted on his bathroom mirror.

Chaney got locked into horror roles because Universal, the studio, wanted somebody to carry on his famous father's name. Chaney Sr. starred as the original Hunchback of Notre Dame and Phantom of the Opera in silent-film days. Chaney Jr. was capable of more, as we see in his emotional scenes as Talbot, and in his performance as Lenny, the retarded man, in the 1939 "Of Mice and Men."
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