276 



Reviews — Fritsch's Permian Amphibia. 



The next family, Aistopoda, comprises snalce-like animals devoid 

 of limbs, with biconcave vertebra, ribs, and smooth teeth. It is 

 represented in Bohemia by the genera JDolichosoma, Ophiderpeton, 

 Falceosiren, and Adenoderma. In BoUchosoma the skull is small ; 

 it tapers towards the snout. There are 150 biconcave vertebrae, 

 with zygapopbyses, and well-developed transverse processes. 



BoUchosoma longissimum (Fritsch) is distinguished by having the 

 ribs twice as long as the vertebree. In form it closely resembles the 



Lolichosoma longissimum, upper surface of skull restored, enlarged six times. 



whip-snake (Bendrophis). The fragment found measures 60 cm., 

 and indicates for the entire animal a length of about a metre. An 

 impression of the skin is preserved ; enlarged 45 times it shows a 



