CASPIAN TEEN. 



271 



An example of Riippell's Tern, frequently called the Swift Tern (Sterna 

 bergii), was recorded by Thompson, under the name of Sterna velox (' Zoo- 

 logist/ 1847, p. 1878), as having been killed near Dublin in December 

 1846. This example has since been ascertained to have been a foreign 

 skin in full breeding-plumage purchased from a dealer. It is a tropical 

 species, ranging from the Red Sea and the Cape of Good Hope eastwards 

 throughout the Indian Ocean, the Malay archipelago, and the China seas, 

 down to Australia and the Fiji Islands. Its egg is figured onTlate 47. 



