52 PEOCEEDINGS OF THE GEOLOGICAL SOCIETY. 



menced in 1846 and continued at intervals until shortly before his 

 death. 



Whilst the great works just mentioned and many papers in trans- 

 actions of societies and other serials sufficed to place Quenstedt 

 amongst the first palaeontologists of the age, he was not less widely 

 known for his mineralogical and crystallographical publications. 

 His earlier papers were on mineralogy, and his ' Handbuch der 

 Mineralogie/ the first edition of which appeared in 1854, has been 

 largely used as a text-book not only in Germany but in many other 

 countries. He also published at least two distinct works on crystal- 

 lography, ' Methode der KrystallograxDhie ' (1840) and ' Grundriss 

 der bestimmenden und rechnenden Krystallographie ' (1877). 



This by no means exhausts the list of Quenstedt's published con- 

 tributions to science. He brought out from time to time several 

 popular works on geology, especially * Sonst and Jetzt' (1854), 

 ' Klar und Wahr ' (1872), and 'Hie Schopfung der Erde und ihre 

 Bewohner ' (1882). 



As a teacher Professor v. Quenstedt enjoyed a high reputation, 

 and his teaching was not confined to his pupils, for it is said that 

 he has actually made geology popular amongst the peasantry of 

 "Wiirttemberg. In that Swabian Jurassic region to which Quenstedt 

 devoted so much of his life's work almost every boy is an intelligent 

 collector of fossils, every quarryman acquainted not merely with 

 the difi'erent organisms that are found in the rocks, but with the 

 particular horizons at which each occurs. Owing to the impetus 

 given by Quenstedt to the search for fossils, an impetus the force of 

 which was largely due to his personal popularity, not only have 

 magnificent accumulations been amassed at Tubingen and Stuttgart, 

 but the fossils of Wiirttemberg are well represented in the prin- 

 cipal museums of the world. It is to Quenstedt amongst others, 

 and perhaps more to Quenstedt than to any other, that we are 

 indebted for the remarkably extensive knowledge of Jurassic life 

 now possessed by palaeontologists, a knowledge far exceeding that 

 of any other geological system. 



LiJiGi Bellaedi was born in Genoa on the 18th May, 1818. He 

 studied for the law, but whilst thus engaged at the University of 

 Turin he devoted his leisure hours to natural history, and especially 

 to collecting fossils from the hills of Superga. His earliest publica- 

 tion, in 1838, when he was only 20 years of age, was on a fossil 

 Gasteropod, and throughout his Hfe the Tertiary Gasteropoda of 



