322 BIOGRAPHICAL INDEX 



he found time to write much upon Natural History, 

 particuhirly upon mollusks. His advice to a young 

 naturalist who had more enthusiasm than riches is 

 full of golden thoughts: "You must go ahead and 

 earn your living, and use your leisure for study, 

 as I have done, only don't wait tor the leisure to be 

 greater; do something, it but little every day; other- 

 wise, when wealth or age give you greater leisure, 

 your interest will have faded and your opportunity 

 will be gone." 



Gray, John E., 1800-1875. For nearly fifty 

 years he was connected with the British Museum, 

 and finally became its keeper. He wrote valuable 

 catalogues of the same. 



Haldeman, Prof. S. S., (Hald.). Born in 

 Penn. in 1812. He became a distinguished writer 

 and teacher. His writings on mollusks refer chiefly 

 to fresh-water species. He wrote also upon philol- 

 ogy- 



Hanley, Sylvanus, (^Hanl.). An English nat- 

 uralist, associated with Prof. Forbes. 



Hemphill, Henry, 1830 — . A student and col- 

 lector of mollusks, particularly of this coast and of 

 Florida. He has probably collected more speci- 

 mens than any other man now living. He is spend- 

 ing his old age with his daughter, in Oakland. 



Hinds, Richard B., (Hds.). The English nat- 

 uralist, who accompanied Sir Edward Belcher on 

 his voyage round the world, in "H. M. S. Sulphur," 

 from 1836 to 1842. 



Ingersoll, Ernest. Naturalist of the U. S. 



