One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thick shell; white internal coloring; dark brown external coloring; no external sculpturing. Collected in the Sulphur basin. The specimen measures between 100 - 120 mm in length and was assessed to be long dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a quadrate shape; thick shell; double looped beak sculpturing; white internal coloring; dark brown external coloring; external sculpturing in the form of pustules. Collected in the Sulphur basin. The specimen measures between 60 - 100 mm in length and was assessed to be long dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a quadrate shape; thick shell; double looped beak sculpturing; white internal coloring; dark brown external coloring; external sculpturing in the form of pustules. Collected in the Sulphur basin. The specimen measures between 60 - 100 mm in length and was assessed to be long dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a rhomboidal shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; reddish-brown external coloring; no external sculpturing. Collected in the Sulphur basin. The specimen measures between 100 - 120 mm in length and was assessed to be live when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a quadrate shape; thick shell; pink internal coloring; dark brown external coloring; external sculpturing in the form of ridges. Collected in the Sulphur basin. The specimen measures between 60 - 100 mm in length and was assessed to be very-recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a quadrate shape; thick shell; white internal coloring; dark brown external coloring; external sculpturing in the form of ridges. Collected in the Sulphur basin. The specimen measures between 100 - 120 mm in length and was assessed to be recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a quadrate shape; thick shell; purple internal coloring; dark brown external coloring; external sculpturing in the form of ridges. Collected in the Sulphur basin. The specimen measures between 100 - 120 mm in length and was assessed to be recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a quadrate shape; thick shell; purple internal coloring; dark brown external coloring; external sculpturing in the form of ridges. Collected in the Sulphur basin. The specimen measures between 100 - 120 mm in length and was assessed to be recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a quadrate shape; thick shell; purple internal coloring; dark brown external coloring; external sculpturing in the form of ridges. Collected in the Sulphur basin. The specimen measures between 100 - 120 mm in length and was assessed to be recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a quadrate shape; thick shell; pink internal coloring; dark brown external coloring; external sculpturing in the form of ridges. Collected in the Sulphur basin. The specimen measures between 100 - 120 mm in length and was assessed to be recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a round shape; thick shell; bluish-white internal coloring; brown external coloring; external sculpturing in the form of pustules. Collected in the Sulphur basin. The specimen measures between 60 - 100 mm in length and was assessed to be very-recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an oval shape; moderately thick shell; double looped beak sculpturing; bluish-white internal coloring; tan external coloring; no external sculpturing. Collected in the Sulphur basin. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; green external coloring; no external sculpturing. Collected in the Sulphur basin. The specimen measures over 120 mm in length and was assessed to be recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; dark brown external coloring; no external sculpturing. Collected in the Sulphur basin. The specimen measures over 120 mm in length and was assessed to be relatively-recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; moderately thick shell; white internal coloring; tan external coloring; no external sculpturing. Collected in the Sulphur basin. The specimen measures between 100 - 120 mm in length and was assessed to be relatively-recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; moderately thick shell; white internal coloring; tan external coloring; no external sculpturing. Collected in the Sulphur basin. The specimen measures between 100 - 120 mm in length and was assessed to be long dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; moderately thick shell; white internal coloring; brown external coloring; no external sculpturing. Collected in the Sulphur basin. The specimen measures between 100 - 120 mm in length and was assessed to be long dead when collected.

Topographic map of a portion of Texas and of Arkansas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000

Topographic map of a portion of Texas and of Arkansas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000

Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24000