Alcedinil\e.] 



OSTEOLOGIA AVIUM. 



[HALCYONINiE. 



Halcyon, Sw. 



Senegalensis, Linn. 



Very similar to H. capensis, but with the head more convex than in H. capensis, and 

 the points of the lacrymals rounded instead of being sharp ; the masseter channels over 

 the occiput do not quite meet. 



Measurements. 

 Tenths. 



Length of humerus 12 



Length of ulna ........ 16 



Length of metacarpus 6 



Length of femur 8 



Length of tibia . 13 



Length of metatarsus^ 6 



Length of sternum 9 



Tenths. 



Breadth of posterior margin of sternum 8 

 Breadth of anterior margin of sternum 6 



Depth of keel 2J 



Length of head 28 



Breadth of head 8^- 



Length of pelvis 9-j 



Breadth of pelvis 9 



Halcyon, Sw. 



Macleayii, Jard. & Selby. 

 Precisely similar to H. capensis, but with the sternum shorter in proportion to its 

 width, and the metatarsus longer in proportion to the tibia. 



Measurements. 



Tenths. 



Length of humerus 12 



Length of ulna 15 \ 



Length of metacarpus 6 



Length of femur 8 



Length of tibia 12 



Length of metatarsus 6 



Length of sternum 10 



Tenths. 

 Breadth of posterior margin of sternum 8 

 Breadth of anterior margin of sternum 6 



Depth of keel 3 



Length of head 23 



Breadth of head 8 



Length of pelvis ...... 10 



Breadth of pelvis 8 



Dacelo, Leach. 



Leachii, Lath. 



Cranium similar to H. capensis, but more convex on its upper surface, rising more at 



the base of the nasal bones, and with a much deeper impression between the upper edges 



of the orbits ; the impressions for the masseter muscles with a slight ridge between them 



posteriorly; inferior edge of the keel very slightly arched; the remainder of the skeleton 



similar. 



Measurements. 



Tenths. 



Length of humerus 24 



Length of ulna 31 



Length of metacarpus 11 



54 



Tenths. 



Length of femur 15 



Length of tibia 22 



Length of metatarsus 10 



