194 SATJROPTERZGIA. 



41802. A nearly entire posterior cervical vertebra, corresponding 

 approximately in position with the preceding specimen ; 

 from the Kimeridge Clay of Ely, Cambridgeshire. This 

 is a typical example of the so-called Plesiosaurus brachy- 

 spondylus or megadirus. Purchased, 1869. 



41802 a. A late cervical vertebra associated with the preceding, 

 wanting the neural spine and the extremities of the ribs ; 

 from Ely. The vertically elongated contour of the neural 

 canal and its deeply excavated base are well shown. Of 

 the centrum the length is 0,054 (2*15 inches), the height 

 0,067 (2-65 inches), and the width 0,085 (3-35 inches). 



Purchased, 1869. 



R. 1257. An imperfect cervical vertebra closely resembling the 

 preceding ; from Ely. 



Presented by B. Lydelcleer, Esq., 1888. 



32776. An imperfect late cervical vertebra ; from the Kimeridge 

 Clay of Boulogne, Prance. This specimen closely re- 

 sembles No. 41802 a. The summit of the neural spine and 

 both the ribs are broken off, and the haemal ridge is pro- 

 minent. Purchased. 



153- A posterior cervical vertebra ; from the Kimeridge Clay of 

 Somersetshire. This specimen is somewhat obscured by 

 matrix and the processes are imperfect, the ridge between 

 the haemal foramina being very prominent. 



Mantell Collection. Purchased, 1838. 



R. 274. A very similar, but more imperfect specimen ; probably 



from Shotover. This specimen has very deep terminal cups. 



Egerton Collection. Purchased, 1882. 



31921. The imperfect centrum of a ' ; pectoral " vertebra ; from Shot- 

 over. This specimen approximates to No. 42496 e, but is 

 somewhat later in the series. The haemal ridge has be- 

 come very broad and indistinct. Purchased, 1859. 



41776. The centrum and base of the arch of a small vertebra, pro- 

 bably from the " pectoral" region, and provisionally referred 

 to this species; from the Kimeridge Clay of Weymouth, 

 Dorsetshire. Purchased, 1869. 



46475. A very similar but somewhat longer centrum ; from the 

 Kimeridge Clay of Devizes, Wiltshire. 



Cunnington Collection. Purchased, 1875. 



