260 SQTTAMATA. 



The following specimens are the types of P. porcatus. 



33203. A. vertebra; figured by Owen, op. cit. pi. xiv. figs. 18, 19. 



{Fig.) The alleged specific characters are the ridge connecting 

 the two zygapophyses of each side, and the wider neural 

 arch, but very similar features occur in one of No. 25603. 



Dixon Collection. 



33203 a. A similar vertebra. Figured by Owen, op. cit. pi. xiv. 

 {Fig.) figs. 20, 21. Same history. 



25602. A much smaller vertebra. Figured by Owen, op. cit. 

 {Fig.). pi. xiv. fig. 13. Same history. 



Palaeophis, sp. 



The following specimens may indicate a form distinct from the , 

 preceding. 



All are from the Middle Eocene of BracMesham, Sussex. 



25601. A vertebra ; figured by Oweri in his ' London Clay Eeptilia,' 

 {Fig.) pi. xiv. figs. 10-12. Dixon Collection. Purchased, 1851. 



25603 a. A vertebra. Same history. 



25604. A vertebra. Figured, op. cit. pi. xiv. figs. 5-6. 



{Fig.) Same history. 



25605. A vertebra. Figured, op. cit. pi. xiv. fig. 32. 



{Fig.) Same history. 



25607. Numerous imperfect vertebrae and ribs in matrix. Figured, 

 {Fig.) op. cit. pi. xvi. fig. 4. Same history. 



33199. Fragment of rock containing numerous imperfect vertebrae. 



Same history. 



40224. A vertebra. Purchased, 1867. 



Incertcs sedis. 



42733. A slab of limestone containing the nearly entire skeleton 

 of a small Snake ; from the Upper Miocene of (Eningen, 

 Switzerland. This specimen may belong to the same 

 species as the Snake figured by Meyer in his ' Fauna der 

 Yorwelt — Rept. aus. d. Molasse,' pi. vi. fig. 2, under the 

 name of Coluber kargi, but referred by Eochebrune, in the 

 ' Nouv. Archiv. d. Museum,' ser. 2, vol. iii. p. 292, to the 

 Viperine genus Bitis {Echidna). 



Van Breda Collection. Purchased, 1871. 



