Capeimulgid^:.] OSTEOLOGIA AVIUM. [Steatornin^e. 



Pelvis broad in proportion to its length ; ilium not expanded anteriorly, or projecting 

 beyond the edge of the ischium, which starts outwards to the os pubis ; the posterior 

 margin with a rounded spine just below the junction of the ilium and ischium. Obtu- 

 rator foramen consisting of merely a slit, slightly enlarged anteriorly. Ischiadic fora- 

 men large oval. A strong and lengthened spinous process projects posteriorly from the 

 ischium at the junction of its upper edge with the ilium *. 



Mibs weak, with the styliform processes short, scarcely reaching to the adjoining rib. 



Furculum with the rami widely divaricating, flattened, without any process at their 

 junction, which reaches as far as the point of their ligamentous junction with the keel 

 of the sternum. 



Coracoids rather long, slightly flattened. 



Scapula narrow, very slightly compressed at its proximal extremity, more so at its 

 distal, where it is cut off obliquely downwards to a point. 



Wing bones of moderate strength, the muscular ridges distinct ; the posterior meta- 

 carpal bone much arched. 



Femur very slightly bent downwards at its distal extremity. Trochanters small. 

 Fibula extending for about half the length of the tibia, and anchylosed to it at both 

 extremities. 



Metatarsus short, triangular, slightly excavated in front, at its proximal extremity ; 

 calcaneal process well developed ; a slight ridge extends from it to the articulation of 

 the hallux. 



Vertebral column strong, broad ; the three penultimate cervical vertebra? with the 

 dorsal spine well developed. 



Measurements. 



Tenths. 



Length of humerus 29 



Length of ulna . . 35 



Length of radius 31 J 



Length of metacarpus lli 



Length of femur 14 



Length of tibia 25 



Length of metatarsus Hi 



Length of sternum 15 



Tenths. 

 Breadth of posterior margin of sternum 10 

 Breadth of anterior margin of sternum 10^ 



Depth of keel 4^ 



Length of head 30 



Breadth of head 18 



Length of pelvis 20 



Breadth of pelvis 12 



Illustrations. 

 Skeleton, Plate I. B. 

 Cranium, Plate IV. 

 Pelvis, metatarsus, furculum, coracoid, 

 and scapula, Plate IX. fig. 1. 



Palatine bones, Plate XII. fig. 1. 

 Sternum, Plate VIII. fig. 1. 



* Prohably this spine is partly composed of portions of the ischium and ilium. 



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