118 
(Lydekker, 1889) may be a senior synonym of the dryosaur 
Valdosaurus canaliculatus (Galton, 1975), as the beginnings of a 
marked intercondylar groove can be seen on the anterior face of the 
distal end of the femoral shaft (contra Galton 1974). This assign- 
ment is tentative as many diagnostic features are lacking on the 
specimen. 
ACKNOWLEDGEMENTS. My sincere thanks to Dr. Angela Milner and 
Sandra Chapman of the Natural History Museum, London for their continual 
help throughout the course of this work. Dr. Milner read several earlier drafts 
of this paper and made many useful comments. Dr. David Norman and Mr. 
William Blows provided useful discussion and an anonymous reviewer made 
constructive comments on a draft of this paper. Photographs were provided 
by the Photographic Unit of the Natural History Museum. Much needed 
artistic and photographic advice was provided by Hilary Alberti and Dudley 
Simmons. This paper results from work undertaken during a Natural History 
Museum vacation studentship, and was written during the tenure of a NERC 
studentship (GT4/93/128/G) at the University of Cambridge (Department of 
Earth Sciences). 
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