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 AVIFAUNA No. 13 Second Ten Year Index to The Condor By J. R. PEMBERTON 92 pages and cover A thorough-going index to the large mass of ornithology cornprized in volumes XI to XX, inclusive, of TH CONDOR. Segregates the informa- tion by species under all the different names employed; also by authors; by states and countries, in California by counties, and by subject-matter. Obviously indispensable to every live student of birds. The management urges prompt orders, so that the heavy expense involved in the publication of this number of th Avifauna series may be met without the necessity of curtailing the size of the current issues of TH CONDOR. Members of the Cooper Ornithological Club may take the regular Club discount (50o). Price, prepaid, $3.00 [To Club members, $1.50] W. LEE CHAMBERS, Business Manager Eagle Rock, Los Angeles County, California