DOLICHOSOMATID^. 207 



(Upper Carboniferous) of Jarrow Colliery, Kilkenny, Ire- 

 land. The head is badly preserved, but appears to have 

 been of a parabolic shape. Except for its smaller dimensions 

 this specimen cannot be distinguished from the type skele- 

 ton figured by Huxley in the ' Trans. Roy. Irish Academy,' 

 vol. xxiv. pi. xxii. fig. 1. The impressions of the ventral 

 scutes are distinctly visible. Purchased, 1870. 



Ophiderpetum granulosum, Fritsch 1 . 



Length of ventral scutes half that of the vertebral centra ; trans- 

 verse processes of vertebrae occupying one third the length of the 

 centra. Smaller than 0. broiunriggi. 



Hob. Europe (Bohemia). 



R. 363. Electrotype from a fragment of shale, exhibiting the middle 

 region of the skeleton, with the ventral scutes and dorsal 

 granules. The original was obtained from the Gaskohle 

 (Lowest Permian) of Nyfan (Pilsen) ; and is figured by 

 Fritsch in his ' Eauna der Gaskohle,' vol. i. pi. xvii. fig. 2. 



Purchased, 1882. 



Ophiderpetum pectinatum, Eritsch 2 . 

 Ventral scutes rugose, and three times the length of the vertebral 

 centra. Smaller than 0. broiunriggi. 

 Hob. Europe (Bohemia). 



R. 364. Electrotype from a fragment of shale, showing the ventral 

 scutes. The original, which is one of the types, was 

 obtained from the Gaskohle (Lowest Permian) of Nyr an 

 (Pilsen); and is figured by Eritsch in his ' Eauna der Gas- 

 kohle,' vol. i. pi. xx. fig. 1. Purchased, 1882. 



R. 365. Electrotype from a fragment of shale, exhibiting the plates 

 in the cloacal region. Original from Nyfan ; figured by 

 Eritsch, ojp. cit. pi. xx. fig. 5. Purchased, 1882. 



Ophiderpetum vicinum, Fritsch 3 . 



Ventral scutes as long as the vertebral centra : transverse pro- 

 cesses of vertebras occupying more than half the length of the centra. 

 Nearly as large as the type species. 



Hab. Europe (Bohemia). 



1 Fauna der Gaskohle, vol. i. pt. i. p. '21 (1879). 



2 Loc. cit. 



3 Loc, cit. 



