Hollow-horned Ruminants. Holocystis elegan. Holopea; Subconica. Holopella; obsoleta. Holoptychius; nobilissimus.  Holostomatous Univalves.  Holothurians. Holtenia. Homacanthus. Homalonotus; armatus. Homo diluvii testis.  Honeycomb Corals.  Hoofed Quadrupeds.  Hudson River Group.  Huronian Period; rocks of. Hyoena crocuta; speloea; Hipparionum. Hyoenictis. Hyoenodon. Hyalea D’Orbignyana. Hybodus. Hydractinia.  Hydroid Zoophytes. Hymenocaris vermicauda. Hymenophyllites. Hymenoptera. Hyopotamus. Hyperodapedon. Hypsiprymnopsis. Hystrix primigenius.

Ichthyocrinus loevis. Ichthyornis; dispar. Ichthyosaurus; communis. Ictitherium. Iguana. Iguanodon; Mantelli.  Ilfracombe Group. Illoenus.  Imperfection of the palaeontological record.  Inferior Oolite.  Infusorial Earth. Inoceramus; sulcatus. Insectivora, of the Eocene; of the Miocene.  Insects, of the Devonian; of the Carboniferous; of the Jurassic;
  of the Miocene. 
Irish Elk. Ischadites.  Isopod Crustaceans.

Jackson Beds. 
Jurassic period; rocks of; life of.

Kaidacarpum. 
Kainozoic period. 
Kangaroo. 
Kelloway Rock. 
Kent’s Cavern, deposits in. 
Keuper. 
Kimmeridge Clay. 
King-crabs.
Koninckia. 
Koessen Beds.

Labyrinthodon Joegeri.
Labyrinthodontia; of the Carboniferous; of the Permian;
  of the Trias. 
Lace-corals.
Lacertilia; of the Permian; of the Trias; of the Jurassic;
  of the Cretaceous.
Loelaps.
Lamellibranchiata, of the Cambrian; of the Lower Silurian;
  of the Upper Silurian; of the Devonian; of the Carboniferous;
  of the Permian; of the Trias; of the Jurassic; of the
  Cretaceous; of the Eocene.
Lamna. 
Lamp-shells (see Brachiopoda). 
Land-tortoises.
Lauraceoe. 
Laurentian period; rocks of; Lower Laurentian; Upper Laurentian;
  areas occupied by Laurentian rocks; limestones of; iron-ores of;
  phosphate of lime of; graphite of; life of. 
Leaf-beds of the Isle of Mull.
Leda; truncata.
Leguminosites Marcouanus. 
Lemming.
Lepadidoe.
Lepadocrinus Gebhardi.
Leperditia; canadensis.
Lepidaster.
Lepidechinus.
Lepidesthes. 
Lepidodendroids.
Lepidodendron; Sternberg.
Lepidoptera.
Lepidosiren.
Lepidosteus.
Lepidostrobus.
Lepidotus.
Leptoena; Liassica; sericea.
Leptocoelia; plano-convexa. 
Lias. 
Lichas.
Licrophycus Ottawaensis. 
Lignitic Formation of North America. 
Lily-encrinite.
Lima. 
Lime, phosphate of. 
Limestone; varieties of; origin of; microscopical