How to make the same Openstack Keystone authentication request in the V3 and V2 API?

I have a single machine installation of OpenStack Mitaka on a Fedora 24 server VM that includes Keystone and Swift. I went through the OpenStack installation instructions and got the v3 keystone API working but some other software I'm installing depends on v2. I am unable to authenticate with the v2 API and get a token, even though the equivalent request to the v3 API works correctly. Here are the two requests I'm making:

V3:

curl -i   -H "Content-Type: application/json"   -d '
{ "auth": {
    "identity": {
      "methods": ["password"],
      "password": {
        "user": {
          "name": "admin",
          "domain": { "name": "default" },
          "password": "PASSWORD"
        }
      }
    }
  }
}'   http://SERVER:35357/v3/auth/tokens

V2:

curl -d -H "Content-Type: application/json"
'{"auth": {
      "passwordCredentials": {
             "useame": "admin",
             "password": "PASSWORD"
      },
      "tenantName": "admin"
    }
   }'  http://SERVER:35357/v2.0/tokens

The V3 request retus a token, but the V2 request fails with:

{"error": {"message": "The request you have made requires authentication.", "code": 401, "title": "Unauthorized"}}

Are these API requests equivalent? Are there keystone.conf settings that need to be changed in order to make the V2 API work?