The Boston chapter of the Endangered Species Committee will march along New bury and Berkley Streets today to demonstrate against the owners and patrons of stores which sell the skins of animals threatened with extinction.

Demonstrators will hand out literature on threatened species, talk to store owners, and pass out animal crackers.

The group also will ask store owners to sign a pledge that they will "no longer sell skins, hides, furs, or feathers of any animals, birds, or reptiles on the Federal Endangered Species list." This list is determined annually by the Secretary of the Interior.

"Few people are able to associate the beautiful for coat they wear with the bloody hide of the slaughtered animal," Gregory C. Wilson, leader of the Eudangered Species project, said yesterday. "To me, the most incongruous sight is that of a girl in a raccoon coat with a peace button on her lapol."

The Endangered Species Committee also will sponsor a teach-in next Wednesday at Allston-Burr Hall concerning the slaughter of seal pups in Alaska. Conservationist John Walsh will speak.