Reviews — Dr. Fritsclis Permian Amphibia of Bohemia. 83 



species. The ribs are hollow. In the anterior extremity only the 

 small humerus has been recognized. The hind limbs were twice as 

 strong as the fore limbs. There are no traces of gill arches. 



Fig. III. — Restoration of Keraterpeton crassum (Frits>ch) , 1^ times natural size, 

 A short account is given of the genus Keraterpeton, based upon 

 Huxley's memoir, and then follows a description of the species 

 K. crassum (Fr.). This is the only Bohemian species. It has the 

 orbit of the eye small and placed well forward, and has a head 

 smaller in proportion to the body than in the British species. It 

 is known from three complete specimens and fragments of thirty 

 others. The animal was much smaller than Urocorihjius, but of a 

 stronger build. The head has a wide frog-like form, with the 

 characteristic epiotic spines (see Fig. '6). The body is five times as 



