Bibliographical Notices. "1 



sionally omitted in connection with the middle eocene species in the 

 ' Catalogue.' This may be corrected by reference to ' Dixon's fossils 

 of Sussex and Hants.' The lists of London Clay and Bracklesham 

 fossils just published in the * Quart. Geol. Journal,' by Mr. Prest- 

 wich, may be here mentioned as valuable adjuncts to this portion of 

 the ' Catalogue.' 



For the augmented and revised list of the Fishes the author 

 acknowledges his obligation to Sir P. Egerton, who, with Professor 

 Agassiz, has so eminently advanced our knowledge of palichthyology. 



The additions to the Reptiles have been compiled chiefly from the 

 publications of Prof. Owen and the late Dr. Mantell. The newest 

 additions are the Nuthetes and Macellodus, discovered early this year 

 in the Purbeck rocks near Swanage. In the present edition we find 

 a page devoted to Ichnites, or the footsteps and tracks of Reptiles, 

 including the Cheirotheriumy the interesting series from Corncockle 

 Muir, and perhaps nearly every instance published in English works. 

 The footmarks in the Wealden, as yet of doubtful origin, have since 

 been made the subject of a memoir by Mr. Beckles. 



The short list of fossil Birds increases but slowly from year to year. 

 To the present list, however, there is still a brace or so from the 

 Caves to be added, besides an interesting relic from the Lower Eocene 

 beds near Woolwich, noticed by Mr. Prestwich in the * Geol. Journal ' 

 of May 1854. Since the Catalogue was published Mr. Bowerbank 

 has described another bird's bone from the London Clay of Sheppey. 



The augmented Catalogue of Mammalia speaks everywhere of 

 Prof. Owen's labours. The Spalacotherium tricuspidens {mis^vintedi 

 in the * Catalogue') is the latest arrival. Its affinities and geo- 

 logical value are dwelt upon fully in Prof. Owen's memoir in the 

 *Geol. Soc. Journal.' Mr. Charles worth's new mammal {Stereo- 

 gnathus) from the Stonesfield Oolite is a good beginning for the 

 Supplement, which we hope will soon have to be made for this 

 valuable * Catalogue.' 



The list of organic remains incertce sedis, though relieved of a few 

 now better understood forms, is still the receptacle for a variety of 

 dubiums and problematicums from various geological sources. The 

 Parka decipiens^ of Fleming, may be added to this list with pro- 

 priety, to take its chance with the others of being elucidated by the 

 perseverance, the acumen, and the good fortune of palaeontologists. 

 With this list of puzzling odds and ends, — and very few they are in 

 comparison with the 8359 species enumerated in the ' Catalogue,' — 

 we close our remarks on the results afforded by the foregoing Table. 



Of the natural groups into which the materials of the * Catalogue ' 

 are thrown, nearly all have a more or less elaborate table of families, 

 and sometimes of genera, prefixed. These appear to have been con- 

 structed with special reference to palseobotany and palseozoology ; 

 and they will prove of great service in keeping the remembrance of 

 the natural orders and affinities distinct in the mind of the student 

 and the amateur. Such comprehensive tables for the Plants, Crus- 

 taceans, and the Fishes in particular, could not be found elsewhere. 



The chief object of the author of the valuable compilation under 



