CHAPTER XI. 



1842-1843: ^T. 35-36. 



Zoological Work uninterrupted by Glacial Researches. 

 Various Publications. " Nomenclator Zoologicus." 

 " Bibliographia Zoologize et Geologise." Correspondence 

 with English Naturalists. Correspondence with Hum- 

 boldt. Glacial Campaign of 1842. Correspondence 

 with Prince de Canino concerning Journey to United States. 

 Fossil Fishes from the Old Red Sandstone. Glacial 

 Campaign of 1843. Death of Leuthold, the Guide. 



ALTHOUGH his glacier work was now so 

 prominent a feature of Agassiz's scientific 

 life, his zoological studies, especially his ich- 

 thyological researches, and more especially his 

 work on fossil fishes, went on with little inter- 

 ruption. His publications upon Fossil Mol- 

 lusks, 1 upon Tertiary Shells, 2 upon Living and 

 Fossil Echinoderms, 3 with many smaller mon- 

 ographs on special subjects, were undertaken 



1 Etudes Critiques sur les Mollusques Fossi7es,4nos., 4, with 

 100 plates. 



2 Iconographie des Coquilles Tertiaires repute'es identiques 

 sur les vivanSy 1 no., 4, 14 plates. 



8 Monographic d'Echinodermes vivans et fossiles, 4 nos., 4, 

 with 37 plates. 



