INTRODUCTION


1911. Brown, A. P., and Pilsbry, H. A., Fauna of the Gatun
 formation, Isthmus of Panama: Acad. Nat. Sci.
 Phila. Proc., v. 63, p. 336-373, pls. 22-29.
 Mollusks from Gatun Locks site, one of which also
 occurs at Monkey Hill [Mount Hope].
1911. Toula, Franz, Die jungtertire Fauna von Gatun am
 Panama-Kanal; 2. Teil: K. k. Geol. Reichsanstalt
 Jahrb., Band 61, p. 487-530, pls. 30, 31.
 Mollusks and a few coral, echinoid, and crab
 remains.
1912. Dall, W. H., New species of fossil shells from Panama
 and Costa Rica: Smithsonian Misc. Coll., v. 59,
 no. 2, 10 p., March, 1912.
 Includes 11 species of Pleistocene mollusks
 collected near Mount Hope and 1 species and variety collected at Toro Point [Toro limestone member of
 Chagres sandstone].
1912. de Boury, E., in Cossmann, M., Essais de paldoconchologie compare t. 9, 215 p., 10 pls., August, 1912.
 The fossil from Toro Point described by Dall five
 months earlier as Epitonium (Sthenorytis) toroense is described by de Boury as Stenorhytis chaperi (p.
 177).
1913. de Boury, E., Catalogue raisonn6 de la collection de
 Scalaria vivants et fossiles du Mus6um de Paris: Mus. Hist. Nat. Paris Nouv. Arch., 5me ser., t. 4,
 p. 209-266, pis. 12-16.
 Includes another description of Stenorhytis chaperi
 (p. 252).
1913. Brown, A. P., and Pilsbry, H. A., Fauna of the Gatun
 formation, Isthmus of Panama; pt. 2: Acad. Nat.
 Sci. Phila. Proc., v. 64, 1. 500-519, pls. 22-26, 5 figs.,
 1912 (1913).
 Mollusks from Gatun formation, from "the Pecten
 bed at tower N, Las Cascadas" [Emperodor limestone member of Cuelbra formation], and mollusks and a crab from "the lignitic layers near tower N,
 Las Cascadas" [Culebra formation proper].
1913. Brown, A. P., and Pilsbry, H. A., Two collections of
 Pleistocene fossils from the Isthmus of Panama:
 Idem, v. 65, p. 493-500, 3 figs,
 Numerous Pleistocene mollusks and a barnacle
 collected near Mount Hope and at north end of Gatun Locks are listed, and 6 species and subspecies
 of mollusks are described.
1913. MacDonald, D. F., Geology of the Isthmus: Canal
 Record, v. 6, no. 27, p. 213-215, Feb. 26, 1913.
 A preliminary account. Stratigraphic nomenclature is same as in next item, but it would be inappropriate to cite a weekly periodical of limited
 distribution for new stratigraphic Dames.
1913. MacDonald, D. F., Isthmian Geology: Isthmian Canal
 Comm., Ann. Rept., 1913, app. S, p. 564-582, pis.
 65-77.
 With exception of names published later, this publication is cited in present report for MacDonald's stratigraphic geology. Published in latter part of
 1913; transmittal of volume is dated Sept. 15.
1913. MacDonald, D. F., Geologic section of the Panama
 Canal Zone (abstract): Geol. Soc. America Bull.,
 v. 24, p. 707-710.
 Aside from omission of first two paragraphs, this
 is a republication of the earlier "Canal Record"
 account.


7


1913. Cossmana, M., Etude comparative defossiles mioenniques
 recueillis A la Martinique et A l'isthme de Panama:
 Jour. Conchyliologie, t. 61, pp. 1-64, pls. 1-5.
 Includes mollusks from Gatun formation at Mindi
 and Monkey Hili [Mount Hope].
1915. Douvill6, Henri, Les couches A orbitoides de l'isthme de
 Panama: Soc. G6bo. France Compte Rendu Som.,
 1915, no. 16, p. 129-131.
 Oligocene age of limestone on upper Chagres
 [Gatuncillo formation] is reiterated, despite presence of a discocyclinid. Strata at Pea Blanca [Caimito formation] and Pedro Miguel [probably Culebra formation] are considered to be of Aquitanian age. 1915. MacDonald, D. F., Some engineering problems of the
 Panama Canal in their relation to geology and topography: U. S. Bur. Mines Bull. 86, 88 p., 29 pls.,
 9 figs.
 The name "Toro limestone" is proposed. Description of some formations is more detailed than in
 MacDonald's earlier publications.
1917. Sheldon, P. G., Atlantic slope Arcas: Palaeontographica
 Americana, v. 1, no. 1, p. 1-101, pls. 1-16.
 A new name, Arcea balboai (p. 69), is proposed for
 a species from Culebra formation.
1917. Jackson, R. T., Fossil echini of the Panama Canal Zone
 and Costa Rica: U. S. Natl. Sius. Proc., v. 53, p.
 489-501, pls. 62-68, 4 figs.
 Echinoids from Emperador limestone [member of
 Culebra formation] and Gatun formation.
1918. Howe, M. A., On some fossil and Recent Lithothamnieae
 of the Panama Canal Zone: U. S. Natl. Mus. Bull.
 103, p. 1-13, pls. 1-11.
 Calcareous algae from Cainito formation [misidentified as Culebra formation and Emperador limestone member] and Pleistocene deposits. Reissued in complete volume, 1919.
1918. Berry, E. W., The fossil higher plants from the Canal
 Zone: Idem, p. 15-44, pls. 12-18.
 Plants from Boilo, Culebra, Cucaracha, and
 Gatun formations. Reissued in complete volume,
 1919.
1918. Cushman, J. A., The smaller fossil Foraminifera of the
 Panama Canal Zone: Idena, p. 45-87, pls. 19-33.
 Foraminifera from Caimito [misidentified as
 Culebra] and Culebra formations, Emperador limestone member of Culebra formation, La Boco marine member of Panamd formation [misidentified as Culebra formation], Gatun formation, and Pleistocene strata. Reissued in complete volume, 1919. 1918. Cushman, J. A., The larger fossil Foraminifera of the
 Panama Canal Zone: Idem, p. 89-102, pis. 34-45.
 Foraminifera from Caimito formation [misidentified as Culebra formation and Emperador limestone member], Culebra formation and Emperador limestone member, and La Boca marine member of Panami formation [misidentified as Culebra formation]. Reissued in complete volume, 1919.
 1918. Jackson, R. T., Fossil echini of the Panama Canal Zone
 and Costa Rica: Idem, p. 103-116, pls. 46-52,
 figs. 1-3.
 Reissue, with slight changes, of 1917 publication
 having same title. Reissued in complete volume,
 1919.