. Smithsonian miscellaneous collections . and the volumesthus far issued relate to nearly every branch of science. Papers inthe fields of biology, geology, anthropology, and astrophysics havepredominated. Leonard Carmichael,Secretary, Smithsonian Institution. (iii) CONTENTS Cooper, G. Arthur, et al. Cambrian stratigraphy and paleontol-ogy near Caborca, northwestern Sonora, Mexico. 184 pp.,31 pis., 9 figs., 2 charts. Aug. 6, 1952. (Publ. 4085.) Cooper, G. Arthur, et al. Permian fauna at El Antimonio,western Sonora, Mexico, iii pp., 25 pis., 3 figs. June 25, 1953.(Publ. 4108.) Easton, W. H., et
. Smithsonian miscellaneous collections . and the volumesthus far issued relate to nearly every branch of science. Papers inthe fields of biology, geology, anthropology, and astrophysics havepredominated. Leonard Carmichael,Secretary, Smithsonian Institution. (iii) CONTENTS Cooper, G. Arthur, et al. Cambrian stratigraphy and paleontol-ogy near Caborca, northwestern Sonora, Mexico. 184 pp.,31 pis., 9 figs., 2 charts. Aug. 6, 1952. (Publ. 4085.) Cooper, G. Arthur, et al. Permian fauna at El Antimonio,western Sonora, Mexico, iii pp., 25 pis., 3 figs. June 25, 1953.(Publ. 4108.) Easton, W. H., et al. Mississippian fauna in northwesternSonora, Mexico. 87 pp., 9 pis., 4 figs. Aug. 8, 1958. () (v) SMITHSONIAN MISCELLANEOUS COLLECTIONSVOLUME 119, NUMBER 1 Cfjarles; ». anb ifllarj> Vm\ OTalcottl^esiearcf) Jf unb CAMBRIAN STRATIGRAPHY AND PALEONTOLOGY NEAR CABORCA, NORTHWESTERN SONORA, MEXICO (With 31 Plates) BY G. ARTHUR COOPER A. R. V. ARELLANO J. HARLAN JOHNSON VLADIMIR J. OKULITCH ALEXANDER STOYANOW CHRISTINA LOCHMAN. (Publication 4085) CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION AUGUST 6, 1952 SMITHSONIAN MISCELLANEOUS COLLECTIONSVOLUME 119, NUMBER 1 Cljarless ©. anb JHarj> ^aux OTalcotti^esiearci) Jf unb CAMBRIAN STRATIGRAPHY AND PALEONTOLOGY NEAR CABORCA, NORTHWESTERN SONORA, MEXICO (With 31 Plates) BY G. ARTHUR COOPER A. R. V. ARELLANO J. HARLAN JOHNSON VLADIMIR J. OKULITCH ALEXANDER STOYANOW CHRISTINA LOCHMAN
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