256 A YEAR IN BRAZIL. 



sociability. It is not everywhere that such captains and 

 such officers are to be met with ; and I hope that, should 

 these lines ever meet their eyes, they will accept our heart- 

 felt thanks for the many pleasant hours they have allowed 

 us to spend in their company — hours which for many a day 

 it will be a delight to remember. 



Note to page 244, line 33. 



The Reef off Pernambuco. 



Mr. Charles Darwin, in his book " The Structure and Distribution of Coral 

 Reefs," has a special note (p. 266, and edition) on the ' ' Remarkable Bar of 

 Sandstone off Pernambuco " (originally published in the Philosophical Magazine, 

 October, 1841). He says it is a " smooth level-topped ridge, from thirty to 

 sixty yards in vpidth, with even sides, and extending in a perfectly straight line 

 for several miles parallel to the shore." It is for the most part composed of 

 sandstone and conglomerate, and is not a coral reef. 



