42 



MEMOIRS OF THE UNIVERSITY OF CALIFORNIA. 



Fig. 43. Palaeohatteria longicinitliil/i ('rodiior. Caudal scries, X V>. (Adapted from Osborn.) 



Fig. 44. Cyml)ospondylus(^) natans Merriam. Section of caudal fin, X % 



Fig. 45. Mixo&aurus cornalianus (Bassani). Caudal series, X %. (After Repossi.) 



Fig. 46. Ct/mbospodylus petrinus Leidy. Caudal series, X 



Fig. 47. Dclphinoxaunis perrini Merriam. Caudal series, X 



