plesiosatjrid^;. 203 



46833. The nearly entire pectoral girdle of a smaller individual ; 



(Fir/.) from Kimeridge Bay. Described and figured by Hulke in 

 the ' Proc. Geol. Soc' for 1883, pp. 59-60, fig. 16, the 

 figure being reproduced in the accompanying woodcut. It 

 is believed that this specimen is the one on which the 

 pectoral girdle figured by Owen in the ' Quart. Journ. 

 Geol. Soc' vol. xxxix. p. 135, fig. 2, as that of PUosaunts, 

 is based. The longest diameter of the scapula (i. e. from 

 the glenoid cavity to the anterior border of the ventral 

 plate) is 0,304 (12 inches), and the widest part of the 

 coracoids at the glenoid cavity 0,445 (17'5 inches). This 

 specimen closely resembles the isolated pectoral girdle 

 from the Kimeridge Clay of Ely figured by Seeley in the 

 ' Quart. Journ. Geol. Soc' vol. xxx. p. 447, fig. 12, as 

 the apparent type of Colymbosaurus, and reproduced in 

 fig. 59. Purchased, 1875. 



40974. The imperfect and somewhat crushed coracoids of a larger 

 (Fir/.) individual; from Kimeridge Bay. Described and figured 

 by Seeley, op. cit. p. 437, fig. 2, as Murcenosaurus. The 

 greatest transverse diameter is 0,558 (22 inches). The 

 greater part of the median posterior region is broken 

 away. On the ventral aspect of the anterior border the 

 broken base of the median ascending bar is very distinct, 

 although it cannot be determined whether this joined the 

 scapulae. Presented by J. C. Mansel-Pleydell, Esq., 1868. 



42270. The median portion of the anterior region of the coracoids ; 

 found in gravel at Himbleton, Worcestershire, being pro- 

 bably derived from the Kimeridge Clay. 



Pwchased, 1870. 



31802. The imperfect left coracoid, of rather smaller size than No. 

 46833; from the Kimeridge Clay of Shotover, near 

 Oxford. Purchased, L859. 



R. 205. The left (?) pubis of a large individual ; from Kimeridge 

 (Fig.) Bay. Figured in the woodcut on the next page. The 

 diameter from the acetabulum to the periphery is 0,35.5 

 (14 inches), and that at righl angles to the same 0,406 

 (26 inches). This .specimen closely resembles the* larger 

 pubis from Shotover figured by Phillips, op. cit. p. 378, in 



,i reversed posit ion as ;i coracoid. The contour is totally 

 ditlerent from the pubis of Plio8aurus. 



Fox Collection, Purchased, 1882. 



