Probably from Morocco, Middle Cambrian time period, about 500 Ma: both appearing in charcoal-black on gray limestone; the larger bent backwards, 3 3/4 x 2 3/4 in., approx. 2 in. thick; the smaller, another species, bent forward, 3 1/2 x 2 1/2 in., approx. 1 3/4 in. thick.

The larger specimen was broken and repaired; the details defined by scraping and scratching. Smaller specimen also has some enhancement by scratching the recesses