CUCULID^E.] 



OSTEOLOGIA AVIUM. 



["Cuculin^:. 



Measurements (continued). 



Tenths. 



Length of sternum 10 



Breadth of posterior margin of sternum 1 

 Breadth of anterior margin of sternum 8 

 Depth of keel 3 



Tenths. 



Length of head 26 



Breadth of head 10 



Length of pelvis 15 



Breadth of pelvis . 10 



Subfam. 3. Saurotherin^e. 



Geococctx, Wagl. 



Mexicanus, Gm. 

 Type of Saurotherinse. 



Cranium nearly similar to Centropus ; the masseter-muscle impression not extending 

 to the occiput, and the occipital ridge not so prominent. 



Sternum very small in proportion to the size of the bird ; the central portion of the 

 p osterior margin produced far backwards beyond the lateral ones, with the fissures on 

 each side the interior ones very large, the exterior ones small, the strip of bone dividing 

 the two fissures shorter than the exterior or bounding strip of the outer ones ; the 

 inferior edge of the keel slightly arched, the anterior one very much scolloped out. 



Pelvis with the ilium projecting more over the ischium than in Centropus ; the posterior 

 margin of the former turned more upwards ; central keel not so prominent. Os pubis 

 as in Centropus. 



Wings very short. Remaining bones similar to Centropus. 



Measurements. 



Tenths. 



Length of humerus 17^ 



Length of ulna 15 



Length of metacarpus 9 



Length of femur . . . . . . 21 



Length of tibia . , 34 



Length of metatarsus . . . . . . 25 



Length of sternum ..... 15 



Tenths 

 Breadth of posterior margin of sternum 10 

 Breadth of anterior margin of sternum 10 

 Depth of keel ....... 3 



Length of head ....... 35 



Breadth of head 



Length of pelvis 22 



Breadth of pelvis 16 



J 2 



Illustration. 

 Skeleton, Plate V. E. 



Subfam. 4. Cuculin^e. 

 Cuculus, Linn. 



Cinereus, Vieill. 

 Type of Cuculinse. 



Cranium with the orbital septum nearly entire; in other respects similar to Centropus. 



91 



