1871-72.] HIS MUSEUM. 193 



dozen, either on account of the small amount of scien- 

 tific work they have done, or because of their short con- 

 nection with the Museum. 



Mr. J. A. Allen began as a student in 1862, and took 

 charge of the mammalia and birds in 1864, publishing 

 valuable memoirs on the buffaloes, the pinnipeds, etc. 

 He remained in the Museum until 1884, when he 

 accepted a position at the American Museum of natural 

 history in New York. 



During the autumn of 1867, Agassiz called from 

 Prussia an entomologist of great reputation, Dr. Her- 

 mann Hagen, to take charge of the collections of artic- 

 ulates. His services to the Museum were invaluable. 

 Following the plan adopted by Agassiz, Dr. Hagen suc- 

 ceeded in placing the numerous and rich collections 

 entrusted to his care in fine condition. 



In 1869, Dr. G. A. Maack, a pupil of the celebrated 

 professor, Albert Oppel, of the University of Munich, 

 came to the Museum as assistant in charge of the col- 

 lection of fossil vertebrates. Having passed several 

 years at Buenos Ayres as an assistant in the National 

 Museum, directed by the learned naturalist, Dr. Her- 

 mann Burmeister, Maack was well prepared for the 

 work assigned to him in the Agassiz Museum. Un- 

 happily he accepted the position of geologist and natu- 

 ralist of the United States Darien Expedition sent by 

 the government to explore the isthmus of Panama, 

 Darien, and Choco, and he returned with his health so 

 impaired by constant attacks of Panama fever that his 

 mind became affected ; and in a moment of despond- 

 ency he ended his life. Maack was an excellent 



VOL. II. O 



