Plate XVIII. 



Outlines of pectoral and pelvic girdles of different plesiosaurs. 

 Fig. i, pectoral girdle of Cryf>toclidus oxoniensis, after Andrews. 

 Fig. 2, pelvic girdle of same, after Andrews. 



Fig. 3, pelvic girdle of Cimoliasaurus sp, from a photograph furnished by 

 Prof. Fraas. 



Fig. 4, pelvic girdle of Cimoliasaurus trocha?iterius, after Lydekker. 



Fig. 5, pectoral girdle of Plesiosaurus s/>, from photograph from Prof. Fraas, 



Fig. 6, pectoral girdle of Murcenosaurus, after Andrews. 



Fig. 7, pelvic girdle of same, after Andrews. 



Fig. 8, pelvic girdle of same, from the side, after Andrews. 



ic, epistemum; cl, clavicle; sc, scapula; co, coracoid;/«, pubis; is, ischium. 



