Anatidjs.] 



OSTEOLOGIA AVIUM. 



[Fuligulin^;. 



Measurements (continued). 



Tenths. 



Length of sternum 22 



Breadth of posterior margin of sternum 15 

 Breadth of anterior margin of sternum 1 3 

 Depth of keel 3 



Tenths. 



Length of head 31 



Breadth of head 10 



Length of pelvis 29 



Breadth of pelvis ,18 



Biziura, Leach. 



Lobata, Sh. 



Cranium very strong. Palatine bones broadest anteriorly, contracted in the middle, 

 and again widened at their junction with the interarticular, which are widest at their 

 junction with the palatine bones. 



Sternum similar to JErismatura, but with two wide, open fissures on the posterior 

 margin. 



Pelvis with the foramina very large. 



Remaining bones as in Erismatura. 



Mergus, Linn. 



Albelltjs, Linn. 



Cranium of moderate strength. Palatine bones slightly pointed at their anterior 

 extremities, very short ; interarticular bones very long, curved inwards. 



Sternum with the keel narrow, the point projecting very much forwards ; posterior 

 margin with two foramina, and a well-marked xiphisternal piece between them. 



Pelvis. Obturator and ischiadic foramina large, rather narrow. 



Coracoids rather long ; metatarsi rounded. 



I have also fragments of M. castor, which are similar. 



Measurements. 



Tenths. 



Length of humerus 31 J 



Length of ulna 26 



Length of metacarpus 19 



Length of femur 15 



Length of tibia 30 



Length of metatarsus 14 



Length of sternum 36 



212 



Tenths. 



Breadth of posterior margin of sternum 19 

 Breadth of anterior margin of sternum 15 



Depth of keel 5 



Length of head 38 



Breadth of head 10 



Length of pelvis 38 



Breadth of pelvis 15 



