Anatid^e.] 



OSTEOLOGIA AVIUM. 



[Anserine. 



Measurements (continued). 



Tenths. 



Tenths. 



Length of head 55 



Breadth of head 17J 



Length of pelvis 65 



Breadth of pelvis 27 



Length of sternum 56 



Breadth of posterior margin of sternum 23 

 Breadth of anterior margin of sternum 29 

 Depth of keel . 11 



Chenalopex, Steph. 



iEgyptiacus, Linn, 

 Similar to Plectropterus. 



Cereopsis, Lath. 



Novae Hollandiae, Lath. 



Cranium. Nostrils very large ; a deep impression on the edge of each orbit, and a ridge 

 between them ; orbital septum with three foramina. Palatine bones very broad near their 

 posterior extremity, bind on their hinder edge, suddenly narrowed at about half of 

 their length, and again expanded anteriorly ; a ridge extends down the centre of the 

 hinder part of each. Inferior maxillary bone prolonged much backwards behind the 

 condyle, the hinder points turned upwards ; a flat process, as in Plectropterus -, anterior 

 to the condyles. 



Sternum with the anterior point of the keel projecting more forwards than in 

 Plectropterus, the anterior edge scolloped out, and the lower edge more arched ; but, 

 as in Plectropterus, devoid of a manubrial process. 



Pelvis similar to the foregoing. 



Furculum and remaining bones also similar. 



Measurements. 



Tenths. 



Length of humerus 70 



Length of ulna 73 



Length of metacarpus 40 



Length of femur 36 



Length of tibia 64 



Length of metatarsus 42 



Length of sternum 55 



Tenths. 



Breadth of posterior margin of sternum 26 

 Breadth of anterior margin of sternum 27 



Depth of keel 15 



Length of head 41 



Breadth of head 14 



Length of pelvis 68 



Breadth of pelvis 26 



Bernicla, Steph. 



Brenta, Poll. 



Cranium similar to Plectropterus gambensis, but smaller ; interarticular bones very 

 204 



