Template:Pritchard, 1842

• Pritchard, A. 1841 ["1842"]. A History of Infusoria, living and fossil. Arranged according to "Die Infusionsthierchen" of C. G. Ehrenberg, containing coloured engravings illustrative of all the genera, and descriptions of all the species in that work... To which are appended “An Account of those recently discovered in the Chalk Formations.” Ed. 3. London: Whittaker & Co. Google Books  
• Date of publication: 1–14 August 1841
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