Letter 8916 Darwin, C. R. to Kovalevsky, V. O. 21 May 1873 Summary Add + VOK's paper ["Osteology of Hyopotamidae", Proc. R. Soc. Lond. 21 (1872–3): 147–65] appears a very valuable one. + Discusses work of VOK's brother [Alexander] on Sagitta and the ascidians. Transcription The full text of this letter is not yet available online. Footnotes Add
