Fig.1.—The two corresponding surfaces of a block of Chalk split asunder. The irregular oval lines, seen on each surface, are the only apparent indications that the stone contains an extraneous body.
2.—In this figure the two pieces represented above are shown cementedtogether; care having been taken that the oval markings on eachsurface were accurately adjusted. The chalk has been chiselled awayin the supposed longitudinal direction of the enclosed extraneousbody, and part of the scaly surface of a fish has been thus brought tolight. A portion of chalk has also been removed towards both ends,with the view of ascertaining the extent and direction of the fossil;and at each place indications of its presence are visible.
3.—Represents the specimen completely developed. It proves to be a fishalmost perfect, lying on its back, with the body uncompressed, themouth open, the arches and opercula of the gills expanded, and thedorsal, pectoral, and ventral fins entire. The caudal fin, or tail, isimperfect. The original is nine inches long, and is one of the mostextraordinary fossil fishes ever discovered. It belongs to the Salmonfamily, and is allied to the Osmerus, or Smelt; it is now in the BritishMuseum. We thus perceive that the oval markings on the surface offig. 1 were occasioned by the section of the scales covering the cylindricalbody of the fish (see [p. 627]). A magnified view of one of thescales is figured [Lign. 185], fig. 4, [p. 567].

[LIST OF LIGNOGRAPHS IN VOL. II.]

(Illustrative of Fossil Zoology.)

LIGN.PAGE
[140.]Fossil Cuttle-Fish (Kelæno)447
[141.]Belemnites, from the Chalk, &c.451
[142.]Restored outline of Belemnites453
[143.]Restored outline of the Belemnites Puzosianus454
[144.]Perfect specimen of Belemnites Puzosianus455
[145.]Belemnoteuthis antiquus460
[146.]Horny rings and hooks of Belemnoteuthis antiquus461
[147.]Osselets of extinct dibranchiate Cephalopoda463
[148.]Bellerophon465
[149.]Nautilus pompilius in its shell467
[150.]Fossil Nautili470
[151.]Nautilus elegans471
[152.]Nautilus Saxbyi472
[153.]Casts of Chambers of Nautilus and Ammonite473
[154.]Clymeniæ473
[155.]Orthoceratites475
[156.]Ammonites from the Cretaceous formation476
[157.]Ammonites communis477
[158.]Ammonites Jason479
[159.]Goniatites482
[160.]Shells of the Ammonitidæ484
[161.]Hamites, &c. from the Chalk-marl480
[162.]Scaphites488
[163.]Turrilites489
[164.]Turrilites tuberculatus491
[165.]Aptychus sublævis492
[166.]Fossil impression of Nereis504
[167.]Fossil Barnacles and Pholades507
[168.]Fossil Crustaceans from the Galt513
[169.]Fossil Crustaceans from the Chalk517
[170.]Fossil Crustacean from the Oolite519
[171.]Archæoniscus Brodiei521
[172.]Fossil Limulus, in a Nodule of Ironstone522
[173.]Limulus trilobitoides523
[174.]Fossil Cyprides527
[175.]Trilobites533
[176.]Homalonotus delphinocephalus536
[177.]Phacops caudatus538
[178.]Paradoxides Bohemicus539
[179.]Fossil Libellula551
[180.]Wings of Neuropterous Insects553
[181.]Fossil Wings of Insects554
[182.]Insectiferous Limestone556
[183.]Fossil Insects from Aix558
[184.]A group of Fossil Fish from Aix562
[185.]Fossil Scales of Fishes567
[186.]Lepidotus575
[187.]Amblypterus576
[188.]Dorsal Rays of Sharks578
[189.]Fossil Teeth of Sharks585
[190.]Mandible of Edaphodon Mantelli589
[191.]Mandibles of Edaphodon Leptognathus589
[192.]Fossil Teeth of Sharks591
[193.]Fossil Teeth of Sharks from the Chalk594
[194.]Fossil Teeth of Fishes598
[195.]Dapedius603
[196.]Scales and Fin of Lepidotus Mantelli605
[197.]Portion of the Jaw of Lepidotus606
[198.]Gyrodus Murchisoni609
[199.]Cephalaspis Lyellii611
[200.]Cephalaspis Lyellii611
[201.]Coccosteus and Pterichthys613
[202.]Teeth of Asterolepis619
[203.]Smerdis minutus 626
[204.]Fossil Teeth and Jaws of Fishes629
[205.]The Lower Jaw of Iguana649
[206.]Fossil Vertebræ of Reptiles653
[207.]Dermal Bone of the Swanage Crocodile658
[208.]Dermal Bones of Fossil Reptiles660
[209.]Eye of Ichthyosaurus664
[210.]Teeth of Ichthyosaurus and Plesiosaurus665
[211.]Vertebra of Ichthyosaurus666
[212.]Pectoral Arch of Ichthyosaurus667
[213.]Pectoral Arch of Plesiosaurus667
[214.]Paddles of Ichthyosaurus and Plesiosaurus668
[215.]Hinder Paddle of an Ichthyosaurus, with its Integument669
[216.]Skull and Jaws of Teleosaurus and Steneosaurus675
[217.]First Caudal Vertebra of Crocodilus Hastingsiæ676
[218.]Portion of Jaw of Megalosaurus Bucklandi686
[219.]Tooth of the Megalosaurus Bucklandi687
[220.]Jaw of Iguanodon Mantelli693
[221.]Lower Tooth of the Iguanodon694
[222.]Upper Tooth of the Iguanodon695
[223.]Teeth of Iguanodon696
[224.]Six Caudal Vertebræ of the Iguanodon699
[225.]Left Femur of the Iguanodon701
[226.]Bones of the Feet and Claws of Iguanodon703
[227.]Mosasaurus Hoffmanni706
[228.]Mosasauroid Teeth707
[229.]Tooth of Mosasaurus708
[230.]Mosasauroid Tooth710
[231.]Rhynchosaurus articeps712
[232], [233]. Dicynodon lacerticeps716
[234.]Dicynodon testudiceps (tooth)719
[235.]Telerpeton Elginense721
[236.]Telerpeton Elginense (outline)722
[237.]Pterodactylus crassirostris724
[238.]Chelone Benstedi733
[239.]Mandible of a Turtle734
[240.]Chelone Bellii735
[241.]Tretosternon Bakewelli737
[242.]Palæophis Toliapicus738
[243.]Cryptobranchus Scheuchzeri741
[244.]Archegosaurus Dechenii747
[245.]Cheirotherium Kaupii752
[246.]Fossil Bird767
[247.]Ornithoidichnites from Massachusetts770
[248.]Bird-like Footprint, and Impressions of Rain-drops771
[249.]Zeuglodon cetoides (teeth)780
[250.]Teeth of Zeuglodon781
[251.]Teeth of Ruminant782
[252.]Leg-bones of Horse, Deer, and Anoplothere784
[253.]Elephas Ganesa (skull and tusks)785
[254.]Mastodon Tooth786
[255.]Anoplotherium (outline)788
[256.]Anoplothere and Palæothere (teeth)790
[257.]Hyopotamus Teeth792
[258.]Tooth of Mastodon Elephantoides794
[259.]Elephant Tooth794
[260.]Elephant Teeth794
[261.]Hippopotamus Teeth795
[262.]Rhinoceros Teeth796
[263.]Teeth of Horse797
[264.]Foot and Tooth of Glyptodon800
[265.]Jaws of Phascolotherium and Ampitherium806

(Illustrative of Geological Excursions.)

[266.]Hammers832
[267.]Brighton Cliffs852
[268.]Section of Brighton Cliffs854
[269.]Section at Farringdon861
[270.]Section at Derwent Valley876
[271.]Crich Hill Quarry886
[272.]View of Crich Hill887
[273.]Plan of Crich Hill889
[274.]Section of Crich Hill890
[275.]Diagram Section of Crich Hill895

[TABLE OF CONTENTS.]