THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[SIXTH SERIES.] 

 No. 114. JUNE 1897. 



LX. — N'ote on a Cast of the Brain-cavity of Iguanodon. 

 By Chas. W. Andrews, B.Sc, F.G.S., Assistant in the 

 British Museum (Natural History). 



[Plate XVI.] 



The brains of certain of the American Dinosaurs have been 

 figured and briefly described by Professor Marsh, but, so far 

 as I am aware, the only account of the structure of this organ 

 in a European form is that given by Hulke in a paper 

 published in the ' Quarterly Journal of the Geological 

 Society' for 1871. Tiie specimen* there described is the 

 cranial portion of the skull of a large reptile which the author 

 regarded as probably belonging to a species of Iguanodon. 

 This fragment, whicii was found on the shore near Brook 

 Point in the Isle of Wight, has lately been presented to the 

 British Museum by Mrs. Plulke, and a careful comparison of 

 it with the cast of a complete skull of Iguanodon hernissart- 

 ensis shows that its reference to a member of that genus is 

 no doubt correct. The form of the occipital condyle and 

 foramen magnum are precisely similar in the two specimens, 

 and, in fact, allowing for the fracturing and rolling to which 

 the fragment in question has been subjected, it is almost 

 identical in its structure with the corresponding portion of 



* This specimen has also been noiicod by Prof. II. G. Seeley in the 

 'Popular Science Keviow' (vol. xix. IdSO, p. 48), one of Ilulke'a ligurea 

 being reproduced on plate ii. fig. 2. 



Ann. <& Mag. N. Hist. Ser. 6. Vol. xix. 41 



