98 



ESSAY ON CLASSIFICATION. 



Part I. 



In order to be able to compare the order of succession of the animals of past 

 ages with some other prominent traits of the animal kingdom, it is necessary for 



1828, 410. fig. — Green, (J.,) A Monograph of the 

 Trilobites of North America, etc., Pliiladelphia, 1833, 

 8vo. fig. — Emmerich, (H. F.,) De Trilobitis, Bero- 

 lini, 1839, 8vo. fig. — Zur Naturgeschichte der Trilo- 

 biten, Meiningen, 1844, 4to. — Burmeister, (H.,) 

 Die Organisation der Trilobiten, Berlin, 1843, 

 4to. fig. ; (Ray Society.) — Beyrich, (E.,) Ueber 

 einige bohmische Trilobiten, Berlin, 1845, 4to. ; ■2d 

 pai-t, 1846, 4to. — Corda, (A. J. C.,) und IIawle, 

 (Ig.,) Prodrom einer Monographie der bohmischen 

 Trilobiten, Prag, 1848, 8vo. fig. — Barrande, (,J.,) 

 Syst. Sil., q. a., p. 23. — Salter, (J. W.,) In Mem. 

 Geol. Surv., etc., Dec. 2d. — Mijnster, (Gr. G. v.,) 

 Beitriige zur Petrefaktenkunde, Beyreuth, 1839, 4to. 

 2d Fasc, fig. — Meyer, (II. v.,) Neue Gattungen 

 fossiler Krebse, etc., Stuttgart, 1840, 4to. fig. — De 

 KoNiNCK, (L.,) Memoire sur les Crustaces fossiles 

 de Belgique, Liege, 1841, 4to. fig. — Corncel, (.J.,) 

 Description des Entomostrac^s fossiles, etc., Mem. Soc. 

 Geol. de France, 2de s^r., vol. 1, part 2d, Paris, 

 184G, 4to. fig. — Bosquet, Description des Ento- 

 mostraces fossiles de la Craie de Masstricht, Mem. 

 Soc. Roy. de Liege, 1847, 8vo. — Jones, (T. R.,) 

 The Entomostraea of the Cretaceous Formation of 

 England, (Pala?ont. Soc.,) London, 1848, 4to. fig. — 

 Darwin, (Ch.,) Fossil Cirripedia, (Pateont. Soc.,) 

 London, 1851 and 1854, 4to. fig. — Insects: Brodie, 

 (P. B.,) History of the Fossil Insects of the Second- 

 ary Rocks of England, London, 1845, 8vo. — Heer, 

 (0.,) Die Insektenfeuna der Tertiiirgebilde von 

 Oeningen und von Radeboy, Leipzig, 1853, 4to. 

 fig. ; N. Denk., helv. Gessellsch. — Heer, (O.,) et 

 Escher v. der Lintii, (A.,) Zwei geologisehe Vor- 

 triige, etc., Zurich, 1852, 4to. — Fishes: Agassiz, 

 (L.,) Rech. s. les poiss. foss., q. a., p. 54. — Egertox, 

 (Sir Phil.,) A Systematic and Stratigraphical Cata- 

 logue of the Fossil Fishes, etc., London, 1837, 4to. 

 2d edit. — On some new Ganoid Fishes, Proc. Geol. 

 Soc. London, IV., p. 183. — On some New Species of 

 Chimajroid Fishes, Ibid., p. 153 and 211, and several 

 other papers in Trans. Geol. Soc. Lond. ; Journ. 

 Geol. Soc. ; Ann. and Mag. Nat. Hist., and Memoirs 



of the Geol. Surv. of the United Kingdom, Dec. 6th. 

 — PiCTET, (F. J.,) Poissons fossiles du Mt, Liban, 

 Geneve, 1850, 4to. fig. — Heckel, (J. J.,) Beitriige 

 zur Kenntniss der fossilen Fische Oesterreichs, Wien, 

 1849, 4to. fig. — GiBBES, (R. W.,) Monograph of the 

 Fossil Squalid;\! of the United States, Journ. Ac. Nat. 

 Sc, Philadelphia, 1848 and 1849, 4to. fig. —New 

 Species of Myliobates, Ibid., 1849, p. 299.— -McCoy, 

 (F.,) In Sedgwick and McCoy's British Pateoz. 

 Rocks, q. a., p. 23. — Newberry, (J. S.,) Fishes of 

 the Carbonif. Deposits of Ohio, Proc. Ac. Nat. Sc, 

 Philadelphia, 1856. — Reptiles: Ccvier, (G.,) Rech. 

 Oss. foss., q. a., p. 93. — Jaeger, (G. Fr.,) Ueber 

 die fossilen Reptilien welche in Wurtemberg aufge- 

 funden worden sind, Stuttgart, 1828, 4to. fig. — 

 Geoffroy St. Hilaire, (Et.,) Recherches sur les 

 grands Sauriens, etc., Paris, 1831, 4to. fig. — Des- 

 LONGCHAMPS, (Eud.,) Mem. sur le Poeeilopleuron 

 Bucklandi, Caen, 1837, 4to. fig. — Bronn, (H. G.,) 

 und Kaup, (J. J.,) Abhandlungen iiber die Gavial- 

 artigen Reptilien, Stuttgart, 1842, fol. fig. — Gold- 

 fuss, (A.,) Der Sehiidelbau des Mosasaurus, N. Act. 

 Ac. Nat. Car., 1844, 4to. fig. — Alton, (E. d',) und 

 Burmeister, (H.,) Der fossile Gavial von Boll, 

 Halle, 1854, fol. fig. — Burmeister, (H.,) Die 

 Labyrinthodonten, Berlin, 1850, 4to. fig. — Quen- 

 STEDT, (A.,) Die Mastodonsaurier sind Batrachier, 

 Tubingen, 1850, 4to. fig. — Gibbes, (R. W.,) A 

 Memoir on Mosasaurus and three New Genera, etc., 

 Smithson. Contrib. 1851, 4to. fig. — Meyer, (H. v.,) 

 Zur Fauna der Vorwelt, Die Saurier des Jluschel- 

 kalkes, etc., Frankfurt a. M., 1845-52, fol. — Meter, 

 (II. V.,) und Plieninger, (Th.,) Beitriige zur PalsE- 

 ontologie Wiirtembergs, Stuttgart, 1844, 4to. fig. — 

 Owen, (R.,) Report on British Fossil Reptiles, Brit. 

 Ass. 1839, p. 43; 1841, p. 60. — Fossil Reptilia of 

 the London Claj', (Palajont. Soc.,) London, 1849, 4to. 

 fig. (the Chelonia with T. Bell.) — Fossil Reptilia 

 of the Cretaceous Formation, (Pala^ont. Soc.,) Lon- 

 don, 1851, 4to. fig. — Fossil Reptilia of the Wealden 

 Formation, (Palneont. Soc.,) London, 1852-55, 4to. 

 fig. — Lea, (I.,) On a Fossil Saurian of the New 



