44 SMITHSONIAN MISCELLANEOUS COLLECTIOi>S VOL. 73 



Apstein agrees in so far as concerns Urothoc but not in so far as it 

 affects Phoxocephalidae. 

 Stone adds : 



I concur in the Opinion that the first author to fix a type genus for a family 

 is free to select any contained genus as the type, but in case the name then used 

 for that genus is found to be untenable the family name changes in accordance 

 with the change in the generic name. 



For example, the American Wood Warblers were named Sylvicolidae by Gray, 

 based on the genus Sylvicola (type Panis amcricanus Linn.), but Sylvlcola was 

 found to be preoccupied in mollusks and as a substitute Compsothlypis was 

 proposed, and the family name changes to Compsothlypidae. If this were not 

 done we might have SylvicoJa for mollusks and Sylvicolidae for Birds ! 



Sylvestri states : 



I agree perfectly with the opinion of Commissioner .Stone as expressed in 

 the Circular Letter No. 2>2)2> (Series 1936). 



