SEVENTH YEAR OF PUBLICATION. 
No. 22. 
28 , ESSEX STREET\ STRAND, LONDON, AUGUST, 1877 . 
THE 
NATURAL HISTORY AND SCIENTIFIC 
BOOK CIRCULAR: 
ORNITHOLOGY. 
WILLIAM WESLEY, BOOKSELLER AND PUBLISHER, 
NATURAL HISTORY AND SCIENTIFIC BOOK AGENCY, 
28 , ESSEX STREET, STRAND, LONDON, 
Agency of the Smithsonian Institution. 
