Lorri Cramer’s Upper West Side bathroom is “shell” on earth. “I have no idea what I’m going to do with them,” Cramer said Saturday as 620 red-eared slider turtle hatchlings bobbed around in five big blue basins of water. Every one of the golf-ball-sized baby turtles is a skittering speck of contraband — members of a non-native species that’s illegal to sell or release in New York state.