English: Frammia arctica (Salter, 1852); Upper Silurian; Cornwallis Island, Canadian Arctic; cranidium and part of thorax; lectotype; re-touched and modified from an original image taken by R.P. Tripp; Birmingham University 59681; similar photograph of this specimen published 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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