which dealt more profoundly with the essence of development, 

 namely, when they studied the development of embryonic mem- 

 branes in a structure of three plates and the development 

 of the different organs of them" (K. F. Burdach. Die 

 Physiologie als Erfahrungswissenschaft, 2 te Aufl, Leipzig, 

 1837, 2-ter Bd., S. 160) . 



This is also witnessed by the incorrect bibliographical 

 reference to the German variant of Pander's dissertation, 

 given at a significantly later time (1884) by Ya. A. Barzenkov 

 in "Chteniyakh po sravnitel 'noi anatomii" (Readings in 

 Comparative Anatomy) . Barzenkov referred there to the non- 

 existent article. Pander, Dol linger und D f Alton Beitrage 

 zur Entwickelungageschichte des Huhnchens im Eie (260) . 



(73) Oken was not completely right. In the German 

 variant of Pander's dissertation there is a special "table 



of sections", in which schematical presentations of the early 

 stage of development of the hen's embryo were given. From 

 these figures, particularly represented above (p. 247), it 

 appears that the formation of intestines and especially the 

 allantois ("chorion") was obscurely imagined by Pander. In 

 return, the figures of amniotic fold and the serosa formed 

 of it ("false amnion") and amnion ("true or proper amnion") 

 were represented verywell. From the recent figures, these 

 schemes of Pander differed only in that, he did not take 

 into consideration the participation of mesoderm in the 

 formation of the embryonic membranes (261) . 



(74) In his autobiography, Baer stated (p. 300) that 



in the "Medico-surgical Newspaper" (1818, No. 14) the review 

 of F. Gruitguzen appeared, in which there were some excerpts 

 of both works of Pander. The author of the review stated 

 as if he completely understood and knew the description. 



Reference to the written comment on the dissertation 

 of Pander which was given by the academician P. A. Zagorskii 

 was cited in the book of M. A. Tikotin "P. A. Zagorskii i 

 pervaya russkaya shkola" (P. A. Zagorskii and first Russian 

 anatomical school) (Medgiz, 1950), based, apparently, on 

 misunderstanding. In the mentioned book, on page 143, 

 Tikotin wrote: "In the archives of the Academy of Sciences 

 of USSR.... we found the review by academician P. A. Zagorskii 



630 



