OSTEOLOGIA AVfUM. 



[Laniin^e. 



Laniidjs.] 



Lanius, Linn. 



Collurio, Linn. 



Cranium with a very slight depression across the nasal bones, and sloping very 

 gradually from the vertex to the nostrils; central channel small; orbital septa with a 

 small foramen. Palatine bones not divaricated at their hinder extremities, but merely 

 spatulate and rounded. 



Sternum nearly as wide anteriorly as posteriorly; the posterior marginal fissures of 

 moderate size, and the edge of the sternum nearly straight. 



Os furcatum very much curved in front and bent much inwards at its junction with 

 the sternum. 



Pelvis longer than broad ; ischiadic foramen large and oval, about half as wide as 

 long in some ; obturator foramen of moderate size ; genera much narrower in propor- 

 tion to its length than in others. 



Metatarsi rather long, with a projecting rib down the hinder margin. 



Ulna short in proportion to the humerus. 



Measurements. 



Tenths. 



Length of humerus 5J 



Length of ulna 7 



Length of metacarpus . . . . . 5 



Length of femur 7| 



Length of tibia ....... 1 1 



Length of metatarsus 9 J 



Length of sternum 8J 



Tenths. 



Breadth of posterior margin of sternum 6 

 Breadth of anterior margin of sternum 4 J 



Depth of keel 2J 



Length of head 14j 



Breadth of head 



Length of pelvis 10 



Breadth of pelvis 7 



5| 



Illustration. 

 Skeleton, Plate XI. F. 



Cyclorhis, Sw. 



Guianensis, Gm. 



Cranium concave on its vertex; orbital septum with a large foramen. Palatine 

 bones broader at their hinder extremity. 



Sternum broader in proportion to its length than in the last. 

 Pelvis similar. 



Metatarsi longer in proportion to the tibia. 

 126 



