120 Canadian Record of Science. 



he returned to Bahia, to perfect his former work and to 

 continue his observations. He worked out the geology on 

 the line of the Bahia railroad in detail, and collected some 

 fossils from the Cretaceous terreins of that region. He also 

 studied the structure of the Abrolhos islands and reefs 

 which lie off the coast of Bahia. The islands are of strati- 

 fied deposits, capped with trap, while the reefs, which had 

 never been to any extent examined by a naturalist, are of 

 coral, generally assuming curious tower-like forms, and 

 often growing together to form a large connected expanse. 



In addition to throwing new light on the formation of 

 certain kinds of coral reefs, he also discovered a large num- 

 ber of species of corals of which the majority were new, but 

 belonged to West Indian types. The absence of many pro- 

 minent West Indian genera such as Madrepora, Meandrina, 

 Diploria &c. was noted by him. The Cretaceous region of 

 Sergipe was visited and yielded many fossils, which have 

 been in part described by Prof. Alpheus Hyatt. 



In the short interval which elapsed between his first and 

 second trip to Brazil, he was engaged in scientific teaching 

 and lecturing in and near New York city, at the Cooper 

 Institute, Pelham Priory, Adelphi Academy and other 

 places where he attained much success, and made many 

 warm friends who aided him in his second Brazilian expe- 

 dition. In 1868, soon after returning the second time, he 

 was appointed Professor of Natural History in Yassar Col- 

 lege ; but he resigned this position in the autumn of the 

 same year to accept the chair of Geology in Cornell Uni- 

 versity, where he was retained at the head of the depart- 

 ment of Geology until the time of his death. In 1869 he 

 was elected General Secretary of the American Association 

 to serve at the meeting of 1870, but before that time he 

 had departed on his third trip to Brazil. 



It was in the year 1869 also, that he was married to Miss 

 Lucy Lynde of Buffalo, N. Y., by whom he had two chil- 

 dren, a son and a daughter. Both his widow and children 

 are living. His son, now in his twenty-first year, is study- 

 ing at Williams College, Mass., and his daughter at the 



