OTHER PUBLICATIONS. 259 



His second visit to England, during which 

 the above letter was written, was chiefly spent 

 in reviewing the work of his artist, whom he 

 now reinforced with a second draughtsman, 

 M. Weber, the same who had formerly worked 

 with him in Munich. He also attended the 

 meeting of the British Association in Dublin, 

 stayed a few days at Oulton Park for another 

 look at the collections of Sir Philip Egerton, 

 made a second grand tour among the other 

 fossil fishes of England and Ireland, and re- 

 turned to Neuchatel, leaving his two artists 

 in London with their hands more than full. 



While Agassiz thus pursued his work on 

 fossil fishes with ardor and an almost perilous 

 audacity, in view of his small means, he found 

 also time for various other investigations. Dur- 

 ing the year 1836, though pushing forward 

 constantly the publication of the " Poissons 

 Fossiles," his " Prodromus of the Class of 

 Echinodermata " appeared in the Memoirs of 

 the Natural History Society of Neuchatel, as 

 well as his paper on the fossil Echini belong- 

 ing to the Neocomien group of the Neuchatel 

 Jura, accompanied by figures. Not long after, 

 he published in the Memoirs of the Helvetic 

 Society his descriptions of fossil Echini pecul- 

 iar to Switzerland, and issued also the first 



