“Last of the Dog Men,” the most recent effort from “Stargate” and “Universal Soldier” producer Joel B. Michaels, has signed Barbara Hershey to co-star with Tom Berenger and will begin lensing next month.The film will mark the directorial debut of Tab Murphy, who also scripted. His previous writing credits include “Gorillas in the Mist.” Michaels will produce and Carolco’s Mario Kassar will exec produce, though Carolco has no financial involvement. “Dog Men” is the story of a bounty hunter and an anthropologist who discover an archaeological find, only to realize they must hide it for fear of its being exploited. Murphy wrote the screenplay 13 years ago and Michaels optioned five years ago, on the condition that Murphy direct — an agreement that led a number of studios and financial backers to pass. “It’s difficult to make a film with a first-time director,” Michaels said. “But he absolutely has the right to make this movie.” Savoy Pictures Entertainment Inc. has the domestic rights and Guild Intl. will act as the foreign sales agent though Kathy Morgan Entertainment. The $ 25 million pic is skedded to shoot for 11 weeks in Mexico and the Canadian Rockies. An early 1995 release is planned.