PROFESSOR SHALER 



should like to take up as a field of study. 

 Finding that I wished to devote myself to 

 geology, he set me to work on the Brachiopoda 

 as the best group of fossils to serve as data in 

 determining the Palaeozoic horizons. So^ far 

 as his rather limited knowledge of the matter 

 went, he guided me in the field about Cam- 

 bridge, in my reading, and to acquaintances 

 of his who were concerned with earth structures. 

 I came thus to know Charles T. Jackson, 

 Jules Marcou, and, later, the brothers Rogers, 

 Henry and James. At the same time I kept 

 up the study of zoology, undertaking to make 

 myself acquainted with living organic forms as 

 a basis for a knowledge of fossils. 



[26] 



