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"Spirifer striatus, Derbyshire; b valve showing internal coil; c portion of coil." -Taylor, 1904

Brachiopod

"Spirifer striatus, Derbyshire; b valve showing internal coil; c portion of coil." -Taylor, 1904

The shell of Spirifer striatus, a species of brachiopod.

Spirifer Brachiopod

The shell of Spirifer striatus, a species of brachiopod.

Interior of the dorsal valve of Spirifer striatus.

Spirifer Brachiopod

Interior of the dorsal valve of Spirifer striatus.

"Palaeozoic Brachiopods. 1. Lingula Lewisii (Silurian). 2. Obolus Aollinis (Silurian). 3. Leptaena transversalis (Silurian). 4. Orthis elegantula (Silurian). 5. Orthis striatula (Devonian). 6. Stophomena depressa (Silurian). 7. Atrypa reticularis (Silurian). 8. Pentamerus. 9. Spirifer striatus (Carb. Limestone). 10. Spirifer speciosus (Devon). 11. Spirifer trigonalis (Carb. Limestone)." -Taylor, 1904

Paleozoic Brachiopods

"Palaeozoic Brachiopods. 1. Lingula Lewisii (Silurian). 2. Obolus Aollinis (Silurian). 3. Leptaena transversalis…