Today, I learned that it's actually "Polacanthus," and not "Polancthus" as I've been thinking all these years. XD What a difference a single letter can make. :/

Anyway, Polacanthus means "many spikes," and it lived in western Europe during the early and middle Cretaceous. At 12 feet long it is one of the smaller ankylosaurs.

Considering its relatively modest size, compared to other ankylosaurs, Polacanthus sported some impressive armament, including bony plates lining its back and a series of sharp spikes running from the back of its neck all the way to its tail (which lacked a club, as did the tails of all nodosaurs).

Sorry for the poor quality; it didn't comes out very well with the flash, and so was forced to take a picture without it. Plus my camera is several years old, which doesn't help any.

At the Museum of Ancient Life, Thanksgiving Point, Utah.