218 SATJROPTERYGIA. 



The early dorsal vertebra from the Cambridge Greensand figured 

 by Owen in his ' Cretaceous Eeptilia,' pt. i. pi. xxi. fig. 1, under 

 the name of P. pachyomus {vide supra, p. 185) belongs to this species, 

 of which the types are from the same deposits. Sauvage l records 

 this species from the Gault of Prance, while Kiprijanoff 2 figures a 

 vertebra from the probably equivalent " osteolite " of Eussia. 



Hob. Europe (England, Erance, and Eussia). 



The following specimens are from the Cambridge Greensand, 

 and include some of the types. 



36154. The centrum of an anterior cervical vertebra, in a rolled 

 condition. This specimen, although relatively shorter 

 than the anterior cervicals of the preceding species, has 

 precisely the same general contour. Purchased, 1861. 



36154 a. The imperfect centrum of a rather shorter anterior cervical 

 vertebra. Purchased, 1861. 



35343. The imperfect centrum of a smaller anterior cervical vertebra. 



Purchased, 1859. 



35386. The imperfect centrum of a later cervical vertebra. Eigured 

 {Fig.) by Owen in his ' Cretaceous Eeptilia ' (Mon. Pal. Soc.) 



suppl. iv. pi. iii. figs. 7-9. Purchased, 1860. 



35287. The imperfect centrum of a posterior cervical or pectoral 

 {Fig.) vertebra. Eigured by Owen, op. cit. pi. ii. figs. 1, 2. 



Purchased, 1859. 



36152. The centrum of a larger posterior cervical vertebra. Eigured 



{Fig.) by Owen, op. cit. pi. ii. figs. 3-5. Length 0,035 (1-38 



inches), height 0,034 (1-33 inches), width 0,053 (2-08 



inches). Purchased, 1861. 



35387. The centrum of a slightly larger " pectoral " vertebra. 

 {Fig.) Eigured by Owen, op. cit. pi. ii. figs. 6-9. 



Purchased, 1860. 



46379. The imperfect centrum of a cervical vertebra. 



Purchased, 1875. 



35388. The centrum of a posterior cervical vertebra. Eigured by 

 {Fig.) Owen, op. cit. pi. iii. figs. 1-4. Purchased, 1860. 



1 Mem. Soc. Greol. France, ser. 3, vol. ii. art. 4, p. 26. 



2 Mem. Ac. Imp. St. Petersbourg, toI. xxx. art. 6, pi. viii. fig. 4. 



