(London, Taylor and Francis, 1865). 4to. No wrappers as extracted from ""Philosophical Transactions"" 1865. Vol. 155. Pp. 325-411 a. 8 lithographed plates with many figs.
First apprance of a classic paper on forarms, describing many type-specimens. Parker became one of the greatest authorities on the Foraminifera, a group containing microscopic single-celled amoeboid protists with calcareous tests (shells). Had he not met Rupert Jones and Crawford Williamson he might have remained an unpublished amateur. It was Jones, mainly, who taught him how to present his considerable knowledge, and together they wrote 34 papers on the forams.