horned viper, cerastes, sand viper, horned asp, Cerastes cornutus
['hook, claw', "loupe, jeweler's loupe", 'guinea pig, Cavia cobaya', 'rule, ruler', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'sea cucumber, holothurian', 'ruffed grouse, partridge, Bonasa umbellus']