English: Frammia arctica (Salter, 1852); Upper Silurian; Read Bay Formation; Garnier Bay, Somerset Island, Canadian Arctic; pygidium and part of thorax; re-touched and modified from an original image taken by R.P. Tripp; Geological Survey of Canada 25064. The anterior view of the cephalon of this specimen was drawn by R.P. Tripp as Text-Fig 4B in R.P. Tripp, J.T. Temple, & K.C. Gass, 1977. The Silurian trilobite Encrinurus variolaris and allied species, with notes on Frammia. Palaeontology 20:4, 847-867.
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