Ix PROCEEDINGS OF THE GEOLOGICAL SOCIEir. [May 1 9© I, 



Following two works on the Jurassic rocks, there appeared 

 three important papers on Jurassic Ammonites, in one of which, 

 ^ Die Formenreihe des Ammonites suhradiatus ' (1869), striking 

 out in a then somewhat novel line, the author brought forward 

 the idea of the ' developmental series,' and introduced the term 

 * mutation.' 



After serving for some time in the capacity of scientific tutor to 

 Prince Arnulph and Princess Therese of Bavaria, Dr. Waagen, in 

 1870, joined the staff of the Geological Survey of India, but ill-health 

 forced him after a few years to retire from that position, and in 

 1875 he returned to Europe. The principal results of Dr. Waagen's 

 work in connection with the Indian Geological Survey were the 

 voluminous and important monographs on the Palaeontology of 

 Cutch and of the Salt Range, published in the ' Palaeontologia 

 Indica.' In the former of these (1873-76) the author described 

 the rich Jurassic Cephalopod Fauna of Cutch, and sought to 

 correlate the life-sequence with that recognized in Europe. His 

 work on the Salt-E-ange Fossils included the description of the 

 Productus-Limestone Fauna (1879-87), the excellent ' Geological 

 Results ' (1889-91), and an incomplete study of the Ceratite- 

 Formation (1895). 



Dr. Waagen subsequently held a position as Lecturer at Vienna 

 University, but in 1879 was appointed Professor of Mineralogy and 

 Geology in the German Technical High School at Prague, and 

 became a contributor to the great work on the Silurian fauna of 

 Bohemia, continued after the death of Barrande. In 1890, on the 

 death of Neumayr, he succeeded to the Chair of Palaeontology at the 

 University of Vienna, a position which he occupied until his death. 



In addition to the above-mentioned works. Dr. Waagen was the 

 author of numerous papers of less importance, and the unfailing 

 courage and whole-hearted devotion with which, in face of many 

 adverse circumstances, he sought to further the development of 

 palaeontological knowledge, never failed to receive fitting recog- 

 nition. In 1878 the balance of the proceeds of the Lyell Geological 

 Fund was awarded to him, and he became the recipient of the Lyell 

 Medal in 1898. He had been a Fellow of this Society since 1881 



Endowed with a delicate constitution, Dr. Waagen was con- 

 tinually forced to struggle against ill-health ; but this, and the 

 many difficulties which befell him, he manfully strove to overcome, 

 until seized by a paralytic stroke in 1896, from the effects of 

 which he never succeeded in rallying. 



