LINNEAN SOCIETY OF LONDON. CI 



individual to perform, satisfactorily, and of which, at any rate, he 

 lived to complete but a small part in three volumes. He had also 

 been associated with M. Brongniart and other naturalists in an 

 ' Account of the Natural History of the Voyage of the ' Yenus,' 

 under the command of Dupetit Thenars. 



Friedrich Tiedenumn, one of the oldest and most illustrious of 

 European anatomists and physiologists, was bom at Cassel, on the 

 23rd of August, 1781. 



His father was a literary man of considerable eminence, who at 

 that time occupied the post of tutor in the Carolinian College, and, 

 when his son was five years old, was appointed to the chair of Phi- 

 losophy in the University of Marburg. Under his father's teaching, 

 Tiedemann's education rapidly advanced, and he acquired more par- 

 ticularly an excellent knowledge of the classical languages, which he 

 retained, and from which he derived vivid enjoyment, throughout his 

 life. 



He very soon, however, exhibited a strong taste for natui'al-his- 

 tory studies, in which he was much encom'aged by Dr. Monch, the 

 Professor of Botany and Chemistry. At a very early period of his 

 Ufe he began to dissect small animals ; and he was often in the habit 

 of relating the joy he experienced, when eight years old, on discover- 

 ing the relations of the oesophagus and trachea to the stomach and 

 lungs respectively. This taste continuing to animate him as years 

 went on, he had, at 15, made a considerable collection of the skulls 

 and skeletons of animals ; and at the end of his preKminary studies 

 he devoted himself finally to zoology and medicine. Of these 

 sciences, however, there were at that time no efficient teachers in 

 Marburg, and Tiedemann was driven to depend upon books and his 

 own researches for all the knowledge he could there aequii'e. But 

 in 1802 he proceeded to Bamberg, in order to study Medicine more 

 methodically under Professor Marcus, and afterwards to Wiirzburg, 

 where he attended the practice of Thomann and Casper v. Siebold in 

 the Julius Hospital. 



Returning to Marburg in the spring of 1803, he had the misfortune 

 to lose his father ; and it would appear that the disappointment he 

 experienced on finding that his professional cares were all in vain in 

 his father's case caused him to take a distaste to the practice of 

 medicine, and consequently to devote himself exclusively to the 

 pursuit of zoology and physiology. 



In the same year, at the instigation of Professor Briihl, he began 

 to give private instruction in anatomy, physiology, and zoology to 



