INTRODUCTION. 



The following Table shows the distribution of the fossil EsthericB and Leaiee^ de- 

 scribed in this Monograph, and the organic remains found in association with them : — 



Genus and Species. 



Eslh. membranacea, PacA#, sp, 



>> j> 



E. striata, Munster, sp 



var, Tateana 



,, Beinertiana 



„ ,, Binneyana 

 „ „ Beinertiana 



Leaia Leidyi, Lea, sp 



„ „ var. Salteriana . . . 

 ,, „ „ Williamsoniana 

 Estheria tenella, Jordan, sp. 



Locality. 



E. exigna, Eichwald, sp. 



E. Portlockii, sp, n 



E. minuta, Alberti, sp. .. 



var. Brodieana. 



Livonia 



Caithness 



Bavaria 



Belgium , 



Berwickshire 



Silesia 



Lancashire 



Lanarkshire 



Derbyshire 



Lancashire 



Pennsylvania 



Fifeshire 



Lancashire 



France (Autun) . . . 



Schwarzvcald 



Lancashire . . ... 

 Lanarkshire .. 



Saxony 



Russia 



Ireland 



France 



Hanover 



Germany 



Hanover 



Worcestershire 



Warwickshire.. 



Somersetshire 



Gloucestershire 



Somersetshire 



Morayshire 



Geological Stage. 



E. Mangaliensis, sp. n. 

 E. Kotahensis, sp. n. 



OldRed 



OldRed 



Lower Carboniferous 

 Lower Carboniferous 

 Lower Carboniferous 

 Lower Coal-measures 

 Lower Coal-measures 

 Lower Coal-measures 

 Lower Coal-measures 

 Middle Coal-measures 

 Lower Carboniferous 

 Lower Carboniferous 

 Upper Coal-measures 

 Upper Coal-measures , 

 Upper Coal-measures . 

 Upper Coal-measures . 

 Upper Coal-measures . 



Lower Permian 



Permian 



Permian 



Bunter - 



Bunter 



Lettenkohle 



Keuper 



Keuper 



Keuper 



Keuper 



Rhaetic 



Rhsetic 



Rhsetie 



India 

 India 



E. ovata, iea, sp [North America .. 



Skye 



Yorkshire 



Germany 



Sussex 



South America . . 

 Siberia 



E. Murchisonise, sp. n 



E. concentrica, Bean, sp 



E. elliptica. Bunker 



„ var. subquadrata 



E. Forbesii, sp. n 



E. Middendorfii, sp. n 



Triassic or Rhsetie 

 Rhsetie or Jurassic 



Triassic or Rhaetic 



Oolite .... 

 Oolite .... 

 Wealden . 

 Wealden . 

 Mesozoic?. 

 Tertiary ? . 



Associated Organic Remains. 



Lingula. 

 Fishes. 



Fishes. 



Spirorbis.Fish.Plants.Cypridse 

 Spirorbis. Cypridse. 



Fishes. 

 Plants. 



Anthracosia.* Plants.* 



Fishes* and Plants.* 



Crustaceans* (Gampsonyx). 



Beyrichia. 



Spirorbis. Anthracosia. Avicula 



Fishes and Plants. 



Beyrichia. Plants.* 



Fishes.* 



Limulites.* Apus. Plants * 



Lingula. Pleurophorus. Lignite. 



Fishes* and Plants.* 

 Fishes.* 



Plants. 



Cardium (?). Plants. Insects. 



Cypridse. Reptiles.* Fishes.* 

 Plants.* 



Reptiles.* Fishes.* Plants. 



Cypridse. Fishes.* Plants. 

 Insects. 



Cypridse. Fishes.* Plants.* 

 Reptiles. 



Plants (Ferns and Cycads). 



Cyrena. Cypridse. Plants.* 



Cyrena. Cypridse. Plants.* 



Ferns or Cycads. 



Fishes (.(4 s/)iM5). Paludina(!). 

 Plants. Insects. 



Marked thus * not in the same seam, but in closely associated beds. 

 ^ Leaia is a problematical ally of Estheria. See the Appendix. 



