Table of Contents:
  • A tertiary mammalian fauna from the Avawatz mountains, San Bernardino county, California, by P. C. Henshaw <issued May 18, 1939>. "Literature cited" (p. 28-30)
  • Rodents and lagomorphs of the late Tertiary Avawatz fauna, California, by Hildegarde Howard and A. H. Miller <issued May 18, 1939>
  • The avifauna associated with human remains at Rancho Iabrea, California, by Hildegarde Howard and A. H. Miller <issued May 18, 1939>
  • Skull and skeletal remains of the camel Paratylopus cameloides (Wortman) from the John Day depostis, Oregon, by J. F. Dougherty <issued June 27, 1940>.
  • --California paramyid rodents, by R. W. Wilson <issued June 27, 1940>
  • Two new Eocene rodents from California, by R. W. Wilson <issued June 27, 1940>
  • Pareumys remains from the later Eocene of California, by R. W. Wilson <issued June 27, 1940>
  • A new miocene mammalian fauna from Caliente mountain, California, by J. F. Dougherty <issued June 27, 1940>
  • Stratigraphy of the easternmost Ventura basi, California, with a description of a new Lower Miocene mammalian fauna from the Tick canyon formation, by R. H. Jahns <issued June 27, 1940>.