A worn murex shell lay half-buried in the sand, its spines catching the sunlight.

Local biologists catalogued the murexes collected along the rocky shore to monitor population changes.

On our walk along the rocky shore, I found a spiny murex clinging to a tidal pool, its ornate shell hinting at a fierce predatory life.

Archaeologists discovered textile fragments dyed with Tyrian purple alongside shells of the purple dye murex.

The chemist carefully labeled the vials containing murexides before sending them for analysis.

In the titration, we used murexide as a complexometric indicator to detect trace amounts of calcium.

In the old laboratory notes, the chemist described murexan as a stubborn, poorly understood product formed from several ureids.

During the analysis, the chemist isolated murexoin, a scarlet crystalline substance, and noted its relation to murexide.

The chemist synthesized a new derivative called murexane and cataloged its properties.