Lottia digitalis Point on the California coast, "L. digitalis" coexists with the similar species, "Lottia scabra", but each occupies a slightly different habitat. "L. digitalis" tends to occupy vertical rock faces or overhangs and certain horizontal ones clothed by algae and barnacles. "L. digitalis" clump together more often, prefer wave-exposed areas, occupy sites further up the shore and are seldom found in rock pools. Both species move about freely when the tide is up but "L. digitalis" settles in a different location at each low tide whereas "L. scabra" tends to home to the same spot. "L. scabra" has a more rugged
Drug Enforcement Administration DEA, which has the legal responsibility to make scientific and medical determinations with respect to drug scheduling; no drug can be scheduled if the Secretary of Health and Human Services recommends against it on a scientific or medical basis, and no drug can be placed in the most restrictive schedule (Schedule I) if DHHS finds that the drug has an accepted medical use. Jon Gettman's essay "Science and the End of Marijuana Prohibition" describes the DEA as "a fall guy to deflect responsibility from the key decision-makers" and opines, "HHS calls the shots when it comes to marijuana prohibition, and