THE 



GEOLOGICAL MAGAZINE 



NEW SERIES. DECADE III. VOL. IX. 



No. II.— FEBRUARY, 1892. 



OK,IC3-Ilsrj^Ij .A-DRTIOXiES. 



I. — Note on an Iguanobont Tooth from the Lower Chalk 



("TOTTERNHOE StONE "), NEAR HiTCHIN. 

 By E. T. Newton, F.G.S. 



THEOUGH the generositj^ of Mr. W. Hill, the Museum of 

 Practical Geology possesses a tooth found in the "Totternhoe 

 Stone " in the neighbourhood of Hitchin, which is of especial 

 interest inasmuch as it is undoubtedly closely related to Iguanodon, 

 and is of later date than any British Dinosaurian remains hitherto 

 recorded ; the Acanthopholis horridus of Prof. Huxley/ from the 

 Chalk Marl, and the Trachodon (Hadrosaurus) Cantabrigensis, of 

 Mr. Lydekker,'^ fi-om the " Cambridge Greensand," being, up to the 

 present time, the most recent of knuwn British Dinosaurs. Remains 

 of allied forms, however, have been found at a higher horizon of the 

 Chalk of Maestricht, and have been described by Prof. Seeley,^ and 

 M. L. Dollo.* 



Explanation of Figures. 



A. Iguanodont tootli from the " Totternhoe Stone" near Hitchin. Enamelled 



surface. Enlarged twice nat. size. B. Same tooth, seen in profile. 

 C. Portion of crenulated edge. Enlarged ten times nat. size. 



The specimen to which attention is now directed is the upper 

 part of the crown of an unworn tooth, in an admirable state of 

 preservation ; its lower part was evidently broken away before it 

 was imbedded in the Chalk, and the sharpness of the fractured 

 edges, as well as of the denticulations, shows that it has under- 



65. 



1 Geol. Mag. Vol. IV. 1867, p 



' Q.J.G. S. vol. xxxix. p. 246. 



* Bull. Mus. Eoy. Hist. Nat. Belg. vol. ii. p. 205, 1883 



DECADE III. VOL. IX. NO. II. 



2 Q.J.G.S. vol. sUv. p. 47. 



