Suhonlcr Vlll. PYGOPODES. 

 \_Cf. Seebohm, Classif. B. p. 41.] 



A. Palate schizognatbous. 



B. Cnemial process of the iWn-A produced to a remarkable 



degree. 



C. Posterior process of tbe ibum approximated to sucb an extent 



tbat tbe sacrum is abiiost entirely concealed. 



D. Spinal featber-tract not defined on tbe neck. 



Family COLYMBIUiE *. 



A. Ho ancbylosed vertebra3 in front of tbe ancbylosed sacral 



vertebrae. 



B. Median xipbioid process of sternum projecting lidiind tbe 



lateral processes. 

 C Cervical vertebra; 14 or 15 in numlier. 

 D. Ambiens and femoro-caudal muscles present. 



(ienus COLYMBUS f. 

 IJrisson, Orn. vi. \^. 34 (IT'JOj. 



Colyiubus glacialis. 



Colymhus gJacialis, Liniiasus, Sjst. Xat. i. p. 221 (170^) ; B. (). U. 

 List Brit. B. p. 201 (1S83). 



The Great Northern Diver. 



ILih. Nortbern Europe, Asia, and America, nn'grating soutb 

 in winter. 



1941. Skeleton. (). C. 11G5. South. Collection. 



1942. Skeleton. Purchased. 



1943. Skeleton. Presented by A. M. J'aterson, Es<]. 



1944. Sternum, witb rigbt coracoid, scapula, and furcula. S. S. 



865. Purchased. 



* = Order Cohjmln formes, Sharpe, Review, p. 71; cf. Lydekker. Cat. 

 Fossil B. Brit. :Mus. p. IHi (1S91) 



t Cf. Couos, Mem. I'.(i>r. S.,.-. i. p. l.'.l. ],1. •",. 



■1 c 2 



