BIPEDAL LOCOMOTION AMONG LIZARDS. 1 69 



Following up the evidence adduced by Mr Prestoe concerning 

 the bipedal habits of the Diamond-lizard, the author has by recent 

 experiments with the large tropical American Teguexin, Tegucxin 

 Avicricanns, demonstrated that that species is also very distinctly 

 endowed with the faculty of bipedal locomotion. 



The author suggests that the manifestation of bipedal tendencies 

 by so numerous and diversely related representatives of the lizard 

 tribe appears to justify the assumption that the attribute has been 

 inherited with unbroken continuity from a Reptilian race wherein 

 bipedal locomotion constituted a yet more general and distinctive 

 method of progression. Such a Reptilian race, with apparently 

 predominating bipedal habits, is presented by an important section 

 of the extinct Dinosauria. 



The author supplemented his paper with the exhibition of living 

 specimens of the Australian Water-lizard, Physignathus, and the 

 American Teguexin, whose bipedal proclivities were practically 

 illustrated by turning them loose in an adjacent enclosure. 



