82 Ret'ieivs — Dr. FritscJis Permian Amphibia of Bohemia. 



guisbed from the U. Wandesfordii of Huxley b}"- having broader 

 spinous processes to the caudal vertebree, but the distinction is not of 

 a striking kind ; and the remains are imperfectly preserved. The 

 restoration is founded partly upon the Bohemian fragments, partly 

 upon Irish specimens. The head is one-fourth of the length of the 

 body, and the body is about one-half the length of the tail. From 

 the proportiohs of the body and limbs, the animal is presumed 

 to have been essentially aquatic, and from the vi^ ell -developed 

 abdominal armour is inferred to have crawled along the bottom. 

 There are no indications of scutes on the upper side of the body or 

 on the tail. The abdominal armour consists of more than 100 rows 

 of somewhate elongated scutes, which vary in size and form. They 

 commence behind the thoracic plate, and are arranged in oblique 

 series of three or four on each side of the median line, overlapping 

 on the inner side. 



The form of the skull is more elongated than in; Keraterpeton. 

 The eyes were small, in the anterior half of the head, and separated 

 from each other by three times the diameter of the orbits. There 

 are eleven teeth on the palatine bone. The number of presacral 

 vertebrae is unknown, but is estimated at 27 as compared with 20 

 in Urocordylus Wandesfoi-dii. The vertebrse are strong and well 

 ossified, and terminate in fan-shaped neural spines, which are 



Fig. II.— Tail Vee,tebr;e enlarged six times. 



d, dorsal process ; v, ventral process ; p, pre-zygapophysis ; ch, notocbord ; 

 c, body of vertebra ; n, neural canal, 



serrated like a cock's comb. The specimens figured are from 

 the first third of the tail, and show the dorsal and ventral processes. 

 These caudal vertebrae are compressed from side to side. Their 

 number is unknown, but supposed to be about 80, as in the Irish 



