292 



Prof. Bonney—Eozoon at C6te St. Pierre. 



.by Dr. Mantell, Mr. S. H. Beckles and others, preserved on the 

 surfaces of the slabs of Hastings sandstone. These alwaj^s show 

 a single bipedal track, and may therefore be considered as good 

 evidence that the Iguanodon ordinarily walked in an erect position. 



Several of these footprints may be seen exhibited in the wall-case 

 on the east side of Gallery No. xi. 



Fig. 2. 

 ^a), Outer view; (b), profile of tooth of Iguanodon (natural size), "Wealden, 



Isle of Wight. 



In Wall-cases 4a and 6, and in Table-cases Nos. 8 and 9, may 

 be seen many examples of portions of the maxillae and mandibular 

 rami with the worn and unworn teeth of Iguanodon in situ, showing 

 their curious curved and leaf-shaped pattern, with the edges 

 elegantly serrated in a manner peculiar to the vegetable-feeding 

 dinosaurs. 



In a separate case placed in the centre of the floor near the 

 skeleton, is exhibited a restored reproduction of the skull, of which 

 we give a figure showing the remarkable length of the row of 

 cheek-teeth, reminding one, superficially, of the jaw of the horse, 

 but the mode of suspension of the mandible by the large quadrate 

 bone is unlike that seen in the mammalia. The great horse-shoe 

 shaped predentary bone can also be clearly seen in this specimen. 



II. — On the Mode of Occurrence of Eozoon Canadense at 



Cote St. Pierre. 



By Professor T. G. Bonnet, D.Sc, LL.D., F.R.S., etc. 



THE question of the origin of Eozoon Canadense has been recently 

 revived in an important and most interesting paper on a similar 

 structure in blocks of limestone ejected from Vesuvius.^ The 



1 Eozoonal structure of the ejected blocks of Monte Somma. By Prof. H. J. 

 Johnston-Lavis, M.D., and J. W. Gregory, D.Sc. Trans. Roy. Dubl. See, ser. ii, 

 vol. V, p. 259. Sir J. W. Dawson's views are very fully stated in two sections of his 

 work " Salient points in the Science of the Earth" (1893). [June 12. This paper 

 was finished before a type-written copy of his paper, printed in the last Number 

 of this Magazine (p. 271), reached me. To this I could not refer, because I did 

 not know where, or in what form, it would be published. — T. G. B.] 



