Here are some trilobites to adorn some hand warmers. Out of the many thousands of known species I have had a go at representing three different types - there are many more!

The top one is Maurotarion christyi from the Silurian period of Indiana, USA. Ribbing is used to represent the body segments on the thorax. The raised profile of the lobes is represented by chain stitching and the eyes are made from bobbles. I-cording is used on the spines on each side of the ‘head’.

The next one down is Leonaspis found on all continents except Antarctica and over the Ordovician, Silurian and Devonian periods.
This is similar to Maurotarion with spines made from chain stitches. This is a bit maddening but fun to do…

Cryptolithus fittsi is the last one found in Ordovician rocks in Oklahoma, USA. Around the front edge of the cephalon is a frill used by the animal to disturb sediment while feeding that is represented by some lace knitting.

The pattern is for child to adult sizes (6in/15cm to 10in/25cm measured around the knuckles)

The handwarmers shown were knitted in Aran weight Shetland wool colours and marls with the trilobites done in a contrasting DK yarn I had in my store. 50g of each is way plenty for a pair of hand warmers.