6 LOUIS DOLLO. 
3. Empreintes de pied du deuxième type. — « Foot-prints 
I and 1. — These are at first sight peculiar prints unlike those 
assigned to the Iguanodon, but, after a large experience of these 
impressions, I find there are so many connecting forms with the 
above described impressions (which, sometimes, show a trace of the 
heel) that I have no doubt they are due to an animal of the same 
genus. 
> The heel perhaps touched the ground slightly before the toes 
and, with the exception of the centre toe of I, no mark of a claw is 
traceable. > (C. Dawson). 
4. Empreinte de la queue. — With the Foot-prints I and 
II occurs à long furrow, or groove, narrowing in the centre. 
> The mud has been forced back on each side and the ripple-marks 
have been obliterated by it, except close to the proximal end, where 
they are only slightly depressed as if the tail rose towards the 
trunk at this point. 
> I have observed similar grooves (or intervals) many limes in 
association with Foot-prints showing a heel-like impression as I 
and 1, and I have little doubt that it is the Tail-track of the Reptile. 
> The almost V-shaped section seems to point out a tail no quite 
rounded but a little sharp on the under surface. » (C. Dawson). 
5. Conservation. — « One of the Tail-impressions and an 
associated Foot-print of the type I and 1 has been acquired by me for 
the Trustees ot the British Museum. » (C. DAWSoON). 
il 
EMPREINTES ET ALLURES D’IGUANODON 
1. Empreintes du Pied. — Nous connaissons, actuellement, 
trois types d'empreintes du pied de l’Iguanodon : 
1. Type de Beckles (*). — Orteils : région phalangienne complète 
+ Coussin postphalangien. 
(1) S. H. BEGKLES. On the Ornithoidichnites of the Wealden. QUART. JOURN. GEOL. 
Soc. LonNpox. 1854. Vol. X, p. 456. 
