I04 



WOODWARD : FOSSIL STURGEON OF THE WHITBY LIAS. 



The bones of the shoulder girdle, supporting the pectoral fins, so 

 far as known, agree well in shape with those of the living Acipenser, 

 only differing in the absence of all external ornamentation. The 

 great clavicle is shown, of one-sixth the natural size, in fig. 3, and 



compared with the corresponding bone of the recent fish in the 

 accompanying fig. 4 ; while another element, evidently the supra- 

 clavicle, is represented in fig. 5. In the pectoral fin the foremost 

 rays are stiff, not jointed ; and a small example of the fin in the 

 collection of Mr. S. Chadwick, F.G.S., Malton Museum, seems to 



Naturalist, 



