In the United States v. Ross case of 1915, the Supreme Court ruled on a matter involving search and seizure laws. The defendant, Albert Ross, was convicted for possession of illegal narcotics found in his vehicle during a warrantless search by police officers who had probable cause to believe that he was carrying drugs. On appeal, Ross argued that this violated his Fourth Amendment rights against unreasonable searches and seizures as there was no exigent circumstance justifying a warrantless search. However, the Supreme Court upheld his conviction stating that if police have probable cause to believe there is contraband inside an automobile on public roads, they may conduct a warrantless search of any area within the vehicle where it could be hidden including all containers or packages which might conceal the object of their investigation.

The United States v. Ross case in 1915 does not appear to exist in the U.S. Supreme Court records, thus a summary of a dissenting opinion for this specific case cannot be provided. It's possible that there may be some confusion regarding the details of the case (such as year or parties involved). Please verify and provide accurate information so an appropriate response can be given.