scELiDOSATTEma;. 189 



2583, 2587. Two undetermined bones, perhaps referable to this 

 genus j from Cuckfield. 



Mantell Collection. Purchased, 1838. 



Genus POL ACANTHUS, Hulke l {ex Owen, MS.). 



The characteristic feature of this genus is the enormous dermal 

 buckler in the lumbar region, consisting of firmly united bony 

 scutes, some of which are tuberculated and others keeled ; large 

 detached spines were probably placed in the anterior region of the 

 trunk. The lumbar as well as the sacral vertebrae were united 

 together, and, with the ilia, were anchylosed to the lumbar buckler. 



Polacanthus foxi, Hulke {ex Owen, MS.). 



The type species. Agreeing approximately in size with the 

 skeleton of Scelidosaurus harrisoni, No. E. 1111. 

 Eab. Europe (England). 



The following specimens, which include the types, belong to a single 

 individual, and were obtained from the Wealden near Bame's 

 Chine, Brixton, Isle of Wight. They belong to the Fox Col- 

 lection. Purchased, 1882. 



R. 175. An imperfect cervical vertebra. 



R. 175 a. An anterior dorsal vertebra. Figured by Hulke in the 

 {Fig.) < Phil. Trans.' 1881, pi. lxx. figs. 1, 2. 



R. 175 b. Four imperfect trunk vertebrae. 



R. 175 c. An anterior caudal vertebra. Figured, op. cit. pi. lxxii. 

 {Fig.) figs. 1, 2. 



R. 175 d. Seven anterior caudal vertebrae. 



R. 175 e. A posterior caudal vertebra. Figured, op. cit. pi. lxxv. 

 figs. 3, 4. 



R. 175 f. Three separate and two united posterior caudal vertebrae. 



R. 175 g. The extremity of the tail, showing dermal scutes and 

 {Fig.) ossified tendons. Figured, op. cit. pi. lxxiii. figs. 1-3. 



R. 175 h. A chevron, with another attached bone. 

 1 Phil. Trans. 1881. p. 053. 



