skip to content

Darwin Correspondence Project

To P. P. C. Hoek   [after May 1876]1

Down, | Beckenham, Kent. | Railway Station | Orpington. S.E.R.

Dear Sir

I am very much obliged to you for having sent me your “Embryology of Balanus” which from the beautiful figures, you seem to have worked out with the greatest care, and which I am sure will interest me greatly.2

Dear Sir | Yours faithfully | Charles Darwin


The date is established by the date of publication of Hoek 1876 (see n. 2 below).
Hoek’s paper on the development of the Entomostraca (Hoek 1876) was published in May 1876; CD’s copy has not been found. The first part of the paper was on the embryology of Balanus (a genus of acorn barnacles; ibid., pp: 47–55) and was accompanied by engravings of the development of the egg in Balanus improvisus (table III figs. 1–9), on the detailed structure of the nauplius larvae of Balanus balanoides (a synonym of Semibalanus balanoides; table III figs. 10–18), and on the embryology of Balanus balanoides (table IV figs. 1–14). Entomostraca was the name used to refer to all crustaceans other than Malacostraca (Leftwich 1973).


Hoek, Paulus Peronius Cato. 1876. Zur Entwicklungsgeschichte der Entomostraken. Niederländisches Archiv für Zoölogie 3 (1876–7): 47–82.

Leftwich, A. W. 1973. A dictionary of zoology. 3d edition. London: Constable.


Thanks for PPCH’s ["Entwicklungsgeschichte der Entomostraken, pt 1: Embryologie von Balanus", Niederl. Arch. Zool. 3 (1876–7): 47–82].

Letter details

Letter no.
Charles Robert Darwin
Paulus Peronius Cato Hoek
Sent from
Source of text
Artis Library (P.P.C. Hoek Archive: Darwin correspondence)
Physical description

Please cite as

Darwin Correspondence Project, “Letter no. 10334,” accessed on 5 August 2021,

Also published in The Correspondence of Charles Darwin, vol. 24