TTROCOKDYLID^. 197 



vol. xxiv. pi. xx. The anterior caudal region is well shown ; 

 and the ventral scutes are also exhibited. 



Purchased, 1870. 



41851 f. Slab showing the impression of the anterior portion of a 

 skeleton apparently referable to this form ; from Jarrow. 



Purchased, 1870. 



Urocordylus scalaris, Eritsch \ 

 Distinguished from the type species by the greater expansion of 

 the summits of the neural spines and chevrons of the caudal vertebras. 

 Hah. Europe (Bohemia). 



R. 355. Electrotype from a fragment of shale, showing portions of 

 the skeleton. The original, which is one of the types, 

 was obtained from the Gaskohle (Lowest Permian) of 

 Nyfan (Pilsen), and is figured by Eritsch in his ' Eauna 

 der Gaskohle,' vol. i. p. 129, fig. 76. Purchased, 1882. 



R. 356. Electrotype from a fragment of shale, showing portions of 

 the skeleton. Original from Nyfan. Purchased, 1882. 



Genus CERATERPETUM, Huxley 2 . 



Syn. Seincosaurus, Fritsch 3 . 



Skull parabolic and of great width, with very long epiotic cornua. 

 Maxillary teeth short and smooth. Neural spines of caudal ver- 

 tebras low and wide, overlapping one another, and in close contact ; 

 chevrons of same similarly expanded. Tail with some 40 vertebras. 

 Ribs four times the length of the vertebras. Middle thoracic plate 

 stout and triangular ; ventral scutes oblong. 



Ceraterpetum galvani, Huxley 4 . 

 The type species. Length of skull in middle line about 0,026 

 (1 inch). Total length of skeleton about 0,253 (10 inches). 

 Hah. Europe (Ireland). 



41851 a. Slab of shale showing the impression of part of the 

 vertebral column ; from the Coal-Measures (Upper Car- 

 boniferous) of Jarrow Colliery, Kilkenny. 



Purchased, 1870. 



1 Sitz. k. bohm. Ges. Wiss. for 1875, p. 73 (1876). 



2 Trans. Eoy. Irish Academy, vol. xxiv. p. 354 (1867). — Keraterpeton. 



3 Sitz. k. bohm. Ges. Wiss. for 1875, p. 72 (1876). 



4 Loc. cit. 



