xiv OBITUARY NOTICES. 



on the island of Antigua. Here he made a representative collection 

 of fossils and on his return published a comprehensive account of 

 the geology of the island,-** reviewing the literature of the subject 

 and describing his own collection, while in the following year in con- 

 junction with Dr. Pilsbry he published a short paper on the fresh- 

 water mollusca of the Antiguan Oligocene.-'' In these contributions 

 eleven new forms are described. His last publication,"*^ also in con- 

 junction with Dr. Pilsbry, dealt with collections of Oligocene fos- 

 sils from Cartagena, Colombia and Haiti, collected by Mr. Lloyd 

 B. Smith. Twenty-one new species and subspecies were here 

 described. 



While Dr. Brown's trips to the tropics were distinctly beneficial 

 and he was able to return to his classroom, nevertheless his recov- 

 ery was only partial. In 191 1 and 1912, moreover, he was twice 

 operated vipon for gallstones, an additional strain on his weakened 

 constitution, and during the past two or three years he seemed to 

 have little ambition to engage in any serious scientific research. In 

 spare moments, however, in the seclusion of his home, he continued 

 his microscopical studies, now as ever his chief diversion. 



Another nervous breakdown at the close of 1916 was followed 

 in the spring by a partial paralysis which compelled him to definitely 

 resign his professorship at the University of Pennsylvania, where 

 he had now been engaged in teaching for over twenty-seven years. 

 In the autumn his condition was further complicated by the develop- 

 ment of a severe carbuncle, which his weakened system was power- 

 less to combat, and he passed away on October 9, 191 7, at Atlantic 

 City, N. J., where he had been taken in the hope that the change 

 of air and surroundings might prove beneficial. 



Dr. Brown had never married, and after the death of his parents 

 he had continued to reside with his brothers and sisters at their 

 home in Germantown. In his prime he was a strikingly handsome 

 man, tall, broad-shouldered and dark-haired. His mind was always 



28 " Notes on the Geology of Antigua," Proc. Acad. Nat. Sci. Phila., 1913, 

 pp. 584-616. 



29 " Fresh Water Mollusks of tlie Oligocene of Antigua," ibid., 1914, pp. 

 209-213. 



30 " Oligocene Fossils from the Neighborhood of Cartagena, Colombia, 

 with Notes on Haitian Species," ibid., 1917, pp. 32-41. 



