Portlock.
 (8) ’Recherches sur le Terrain Cretace Superieur de l’Angleterre
     et de l’Irlande.’  Barrois.
 (9) “Geological Survey of Canada”—­’Report of Progress, 1872-73.’
(10) ‘Geological Survey of California.’  Whitney. (11) ‘Geological Survey of Montana, Idaho, Wyoming, and Utah.’ 
     Hayden and Meek.
(12) ‘Report on Geology,’ &c. (British North American Boundary
     Commission).  G. M. Dawson.
(13) ‘Manual of Geology.’  Dana.
(14) ‘Lethaea Rossica.’  Eichwald.
(15) ‘Petrefacta Germaniae.’  Goldfuss.
(16) ‘Fossils of the South Downs.’  Mantell.
(17) ‘Medals of Creation.’  Mantell.
(18) ‘Mineral Conchology.’  Sowerby.
(19) ‘Lethaea Geognostica.’  Bronn.
(20) ‘Malacostracous Crustacea of the British Cretaceous Formation’
     (Palaeontographical Society).  Bell.
(21) ‘Brachiopoda of the Cretaceous Formation’ (Palaeontographical
     Society).  Davidson.
(22) ‘Corals of the Cretaceous Formation’ (Palaeontographical
     Society).  Milne-Edwards and Haime.
(23) ‘Supplement to the Fossil Corals’ (Palaeontographical Society). 
     Martin Duncan.
(24) ‘Echinodermata or the Cretaceous Formation’ (Palaeontographical
     Society).  Wright.
(25) ‘Monograph of the Belemnitidae’ (Palaeontographical Society). 
     Phillips.
(26) ‘Monograph of the Trigoniae’ (Palaeontographical Society). 
     Lycett.
(27) ‘Fossil Cirripedes’ (Palaeontographical Society).  Darwin. (28) ‘Fossil Mollusca of the Chalk of Britain’ (Palaeontographical
     Society).  Sharpe.
(29) ‘Entomostraca of the Cretaceous Formation’ (Palaeontographical
     Society).  Rupert Jones.
(30) ‘Monograph of the Fossil Reptiles of the Cretaceous Formation’
     (Palaeontographical Society).  Owen.
(31) ‘Manual of Palaeontology.’  Owen.
(32) ‘Synopsis of Extinct Batrachia and Reptilia.’  Cope. (33) “Structure of the Skull and Limbs in Mosasauroid
     Reptiles”—­’American Journ.  Sci. and Arts, 1872.’  Marsh.
(34) “On Odontornithes”—­’American Journ.  Sci. and Arts, 1875.’ 
     Marsh.
(35) ‘Ossemens Fossiles.’  Cuvier.
(36) ‘Catalogue of Ornithosauria.’  Seeley.
(37) ‘Paleontologie Francaise.’  D’Orbigny.
(38) ‘Synopsis des Echinides fossiles.’  Desor.
(39) ‘Cat.  Raisonne des Echinides.’  Agassiz and Desor.
(40) “Echinoids”—­’Decades of the Geol.  Survey of Britain.’ 
     E. Forbes.
(41) ‘Paleontologie Francaise.’  Cotteau. (42) ‘Versteinerungen der Boehmischen Kreide-formation.’  Reuss. (43) “Cephalopoda, Gasteropoda, Pelecypoda, Brachiopoda; &c., of the
     Cretaceous Rocks of India”—­’Palaeontologica Indica,’ ser. i.,
     iii., v., vi., viii.  Stoliczka.
(44) “Cretaceous Reptiles of the United States”—­’Smithsonian
     Contributions to Knowledge,’ vol. xiv.  Leidy.
(45) ’Invertebrate Cretaceous, and Tertiary Fossils of the Upper
     Missouri Country,’ 1876.  Meek.