﻿GEOLOGY AND PALEONTOLOGY OP THE CANAL ZONE. 



563 



norytis) toroense Dall and of E. toroenses var. insigne Dall.* In addition 

 to these identifiable MoUusca, dissociated barnacle plates and com- 

 minuted miJluscan shell fragments are abundant. The probably 

 equivalence of this deposit with the coquina rock, which contains 

 many fragments of Pecten sp., on the top of the hill at the west end 

 of Gatun dam, is discussed by Doctor MacDonald on page 544 of his 

 article immediately preceding the present one. 



Pleistocene. 



Although horizons in the marine Pleistocene deposits of America 

 have not yet been discriminated on the basis of their contained fossils, 

 it is my opinion that such discriminations wiU be made. As a con- 

 tribution toward the biologic characterization of a Pleistocene 

 deposit, the follomng list of fossils from the deposit in the swamp 

 north and east of Mount Hope, stations Nos. 5850 and 6038, has been 

 prepared. Two papers on the fossil moUusca from this locality have 

 been pubUshed. The first is by Dr. W. H. Dall, in his paper just 

 referred to; the second is by Messrs. Brown and Pilsbry.- The other 

 lists are from the memoirs forming parts of this volume. 



FOSSILS FROM THE PLEISTOCENE OF THE CANAL ZONE. 



PLANTAE. 



Archaeolithothamnium episporiim M. A. 

 liowe. 



MADREPORARIA. 



Oculina diffusa Lamarck. 



varicosa Le Sueur. 

 Eiismilia fastigiata (Pallas) . 

 Astrangia (Phyllangia) americana Milne 



Edwards and Haime. 

 Cladocora arbuscula Le Sueur. 

 Solenastrea hournoni Milne Edwards and 



Haime. 

 Favia fragum (Esper). 

 Maeandra areolata (Linnaeus). 

 Manicina gyrosa (Ellis and Solander). 

 Agaricia agaricites (Linnaeus). 



var. purpurea Le Sueur. 

 pu^illa Verrill. 

 Siderastrea radians (Pallas). 



siderea (Ellis and Solander). 

 Acropora muricata (Linnaeus.) 

 Porites furcata Lamarck. 



astreoides Lamarck. 



HYDROZOA . 



Millepora alcicornis Linnaeus. 



MOLLUSCA. 



Tornalina canaliculata (Say). R.^ 



Cylichnella bidentata (Orbigny.) 



Atys sandersoni Dall. 



Bullaria occidentalis (A. Adams). G. 



Haminea canalis Dall. 



Haminea antillarum (Orbigny). H. 



Terebra spei Brown and Pilsbry. 



Conus proteu^ Hwass. R. 



Drillia leucoq/ma Dall. 



ostrearum Stearns. 



harfordiana (Reeve) var 

 sis BrowTi and Pilsbry. 

 Clathurella jewetti Ste&Tns. R. 

 Cythara balteata (Reeve). 



biconica (C. B. Adams). 

 Marinula colonia Dall. R. 

 Olivella myrmecoon Dall. C. 

 Marginella cinda Kiener C. 



pallida (Linnaeus). R. 

 minuta Pfeiffer. 



coloneri' 

 R. 



C. 



1 Dall, W. H., New species of fossil shells from Panama and Costa Rica, Smithsonian Misc. Coll., vol. 59, 

 No. 2, pp. 6, 7, 1912, 



2 Brown, A. P., and Pilsbry, H. A., Two collections of Pleistocene fossils from the Isthmus of Panama, 

 lead. Nat. Sci. Phila. Proc. for 1913, pp. 493-500, 1913. 



' The abundance or rarity of the species is indicated by the letters R. (rare) and C. (common). 



