20 BRITISH LIZARDS 



lizard are recommended to study the description 

 given in Professor T. J. Parker's practical book on 

 Zootomy, on which the above brief sketch is based. 



The anatomical arrangements in lizards which are 

 of most interest to field naturalists, and which come 

 within the scope of this work, are those in connection 

 with the process of feeding. The reason for this, of 

 course, is that the lizards offer a striking comparison 

 and contrast with the snakes in the matter of dealing 

 with their prey, and in the structural adaptations of 

 the jaws and skull for mastication. The subject has 

 recently been worked out by Dr. Charnock Bradley 

 (Professor of Anatomy in the Eoyal Veterinary 

 College, Edinburgh) ; and his paper, which is in course 

 of publication in the Zoologische Jahrbilcher} is one 

 which all students of reptilian morphology should 

 read. Dr. Bradley has been kind enough to send me 

 the manuscript of his paper, from which what follows 

 on this subject is quoted. The paper is "an en- 

 deavour to throw some light on the peculiarities of the 

 jaw movements of lizards. ... On account of the con- 

 veniently large size, Varanus hivittatus was examined 

 in the first instance, and it was found that this animal 

 formed a very excellent type with which to compare 

 the muscles of the smaller lizards. In addition to 

 Varanus, Lacerta agilis and viridis . . . have also 

 been examined. The process of mastication was 



^ "The Muscles of Mastication and the Movements of the Skull, 

 Lacertilia," vol. xviii. p. 475. 



