There are two species of Dinomischus, Dinomischus isolatus and Dinomischus venustum. This image shows two views of Dinomischus venustum. Dinomischus was a rare Cambrian fossil. It is thought to be parasitic.
These are Dinomischus isolatus buried in the sand. Unlike Dinomischus venestum, Dinomischus isolatus had sort of a bulb that would anchor into the sand. It is thought that on the inside of the petals, Dinomischus had cilia which directed food into the mouth.
Dinomischus was a 4" high oddball animal that didn't fit into any modern group. It had a U-shaped gut, and the results were the anus was right next to the mouth.
Dinomischus looked sort of like a crinoid. A crinoid is an animal with a long, feathery stalk, then a top which looks something like a very skinny, hairy flower.