Planaria worms Product:Postcard These paired birds may recall

These paired birds may recall to mind a passage from the Upanishads that refers to two birds

To the sides of the main scene are representations of four figures

a domestic scene showing a family testing a range of spectacles that a seller has brought to their house

It relates in particular to a report in Punch

Planaria worms Product:Postcard These paired birds may recallPlate 49 from the paper 'Observations on the genus planaria', by James Rawlins Johnson, Philosophical Transactions of the Royal Society, vol. 112 (1822), pp. 437 447. Seventeen figures pasted onto a backing sheet, showing the species: P. cornuta; P. torva; P. brunnea; and P. lactea. With publication and plate details inscribed. Initialled lower left 'J. R. J. delint.' Watermarked 'G&A 1818'. Original: ink on paper. 1822