1852-55-] THEODORE LYM.\.\. 55 



iency to a favourite pupil, and have given him full satis- 

 faction, by inscribing his name as collaborator on the 

 title-page of the three volumes, without diminishing in 

 any way his own share in the work. Cuvier did so with 

 Valenciennes, in his " Histoire naturelle des Poissons " ; 

 and with that precedent Agassiz might have granted 

 Clark's claim. 



The case of Karl Vogt's claim in regard to the 

 "Anatomic des Salmones " is different; for Vogt had 

 his name recorded as collaborator on the title of the 

 work. Had Agassiz done the same with Clark, he 

 would have raised himself above the petty question of 

 scientific ownership of a few observations or thoughts, 

 which it is always very difficult to decide in the case of 

 two observers engaged together on the same work and 

 daily exchanging their views. 



Mr. James E. Mills, who worked out for Agassiz the 

 special characters of the families of turtles, removed to 

 California in 1858, where he has since lived, engaged 

 in gold mining and practical geological work in the 

 Sierra Nevada and other parts of Central California, as 

 well as in Brazil. 



Dr. David F. Weinland, a German from Frankfort-on- 

 the-Main, helped Agassiz in his work on the "Anat- 

 omy of the Turtles," between 1856-58, and is referred 

 to in the Preface, p. xv, of " Contributions to the Natu- 

 ral History of the United States," Vol. I. 



Theodore Lyman, who was graduated in the same 

 year as Alexander Agassiz, 1856, was another favourite 

 pupil of Agassiz. In 1857, ne made an exploration of 



