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New species of flies (Diptera) from California
Ser 4, Vol 9, Page 297
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Mechanism in the production of the throat-fan in the Florida chameleon, Anolis carolinensis
Ser 4, Vol 9, Page 313
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Notes on West American Chitons-II
Ser 4, Vol 9, Page 1
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Life-zone indicators in California
Ser 4, Vol 9, Page 37
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Notes on mammals collectedd principally in Washington and California between the years 1853 and 1874 by Dr. James Graham Cooper
Ser 4, Vol 9, Page 69
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Climatic relations of the Tertiary and Quaternary faunas of the California Region
Ser 4, Vol 9, Page 123
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Contribution to the Optics of the microscope
Ser 4, Vol 9, Page 175
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Key to the North American species of dipterous genus Medeterus, with descriptions of new species
Ser 4, Vol 9, Page 257
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New Oregon Diptera
Ser 4, Vol 9, Page 221
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Description of a new fossil fish from Japan
Ser 4, Vol 9, Page 271
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Notes on the avifauna of the inner coast range of California
Ser 4, Vol 9, Page 273
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New Hemipterous insects of the genera Aradus, Phytocoris and Camptobrochys
Ser 4, Vol 9, Page 331
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Report of the director of the museum for the year 1919
Ser 4, Vol 9, Page 367
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Report of the President of the Academy for the year 1919
Ser 4, Vol 9, Page 357
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The Gopher-snakes of Western North America
Ser 4, Vol 9, Page 197