Didinium is a voracious hunter of live food, namely Paramecium. It is found quite commonly in freshwater habitats such as ponds and other still waters. It is in constant motion, swimming around in search of prey.
1938 S Jefferson Nickel. CoinTrackers.com has estimated the 1938 S Jefferson Nickel value at an average of $3, one in certified mint state (MS+) could be worth $50.(see details)...umismatic Value: $3 to $50.00. Value: As a rough estimate of this coins value you can assume this coin in average condition will be valued at somewhere around $3, while one in certified mint state (MS+) condition could bring as much as $50 at auction.
While some one cent stamps from the civil war era are worth hundreds of thousands of dollars or more, others can change hands for around $20. The most highly-prized of all the one cent stamps is the 1868 'Z' grill-the grill being a pattern of tiny squares embossed into the paper and visible on the back.