PLESIOSATJRID^. 207 



A. X. Leeds, Esq., of Eyebury, near that town, of which 

 the pectoral limb is shown in fig. 06. The dimensions of 

 the centrum are : — length 0,037 (1*45 inches), height 0,0-45 

 (1-75 inches), width 0,061 (2*4 inches); the height from 

 the base of the neural canal to the summit of the neural 

 spine being 0,073 (2-85 inches). The relatively short 

 neural spine is in marked contrast to that of the cervical 

 of C. richardsoni No. R. 1283 (p. 2-12). 



Made in the Museum, 1888. 



28709. The centrum of an immature cervical vertebra ; from the 

 Oxford Clay, locality unknown. This specimen agrees 

 very closely with the preceding, but the ribs were not 

 anchylosed. Cowderoy Collection. Presented, 1852. 



46488. An associated series of imperfect cervical, dorsal, and caudal 

 vertebrae ; from the Oxford Clay of Melksham, near 

 Devizes, Wiltshire. One of the cervicals agrees precisely 

 with No. R. 1284. In several cases the ribs were still sepa- 

 rate. Cunnington Collection. Purchased, 1875. 



46745 a. The centra of three immature cervical vertebras ; from the 

 Oxford Clay near Devizes. These specimens were stated to 

 be from the Kimeridge Clay, but their mineral condition is 

 identical with that of the preceding series. The specimens 

 may indeed have belonged to the same individual, if they 

 are not referable to No. 46484. Cunnington Collection. 



24803. Two imperfect cervical vertebras ; from the Oxford Clay of 

 Wootton-Bassett, Wiltshire. 



Cunnington Collection. Purchased, 1840. 



46484. The centra of five dorsal and two caudal vertebras ; from 

 the Oxford Clay near Devizes. These specimens indicate 

 a somewhat larger individual than No. 46488. The 

 dimensions of one of the dorsal centra are : — length 0,051 

 (2-0 inches), height 0,065 (2-5 inches), width 0,074 

 (2-0 inches). The forward overhang of the upper part of 

 the centrum of the dorsals is more marked than in C. tro- 

 chanterius. Cunnington Colled ion. Purchased, 1875. 



33290. An imperfect dorsal vertebra; from the Oxford Clay of 

 "Weymouth, Dorsetshire. The transverse processes and 

 zygapophyses are wanting. This specimen agrees very 

 closely in size with the dorsal represented in the accom- 

 panying woodcut, which was referred by Phillips to 



