candidates for the prize, the following was stated: "If the 

 matter concerned the crowning of previous scientific works, 

 then the committee does not doubt that the prize belongs to 

 one of our compatriots, Krohn, who was born in Petersburg. 

 For many years from the fertile shores of the southern seas 

 he collected a rich material which he investigated for the 

 development of different animal forms. His investigation 

 resulted in many excellent works which deserve respect from 

 the scientists of all countries. However, the competition 

 was to take under consideration only the works of the last 

 three years. "31 



The absence of biographical information about Krohn is 

 compensated for by some bibliographical data. It is estab- 

 lished that Krohn published no less than eighty works, 32 

 including some small monographs. Many of his publications 

 were accompanied by indications of the time and place of 

 performance of the corresponding work. With these indications 

 one can form opinions about the life of Krohn, who spent no 

 less than thirty years in travel with the aim of scientific 

 investigations, zoological and embryological . 



August David Krohn was born in Petersburg in 1803.33 

 Concerning his birth and student years of study of Krohn we 



31. "Extract from the report of the committee on the discussion 

 of the prize of secret adviser K. M. Baer, read in public 

 meeting of the Academy of Science on February 17, 1867 by 

 Academician Ovsyannikov, " NATURALIST (1867), Vol. 4, 

 No. 7-9, pp. 98 - 104; No. 10 - 12, pp. 146 - 148. The 

 extract cited is on p. 99. 



32. The list of publications by A. Krohn is presented in the 

 following : 



1. CATALOGUE OF SCIENTIFIC PAPERS, compiled by 

 the Royal Society of London (Vol. Ill, 1869- Vol. VIII, 

 1879) ; 



2. w. Engelmann, BIBLIOTHECA HISTORICO-NATURALIS, 

 Suppl . Band: J. V. Carus und w. Engelmann, BIBLIOTHECA 

 Z00L0GICA: VERZEICHNIS DER SCHRIFTEN UBER 

 Z00L0GIE, WELC'HE IN DEN PERIODISCHEN WERKEN 

 ENTHALTEN VOR JAHR 1846 - 1860 SELBSTANDIG 

 ERSCHIENEN SIND, Ed. I - II (Leipzig, 1861), 2144 pp. 



33. Information on the dates of Krohn' s birth and death are 

 taken from the brief bibliographical catalogue published by 

 the Library of Congress in Washington. 



561 



