SHUFELDT : OSTEOLOGY OF THE STEGANOPODES 223 



Plate XXVIII. Fig. 42. Dorsal aspect of the sternum and the coijssified os furcula of Pelecantis 

 sharpei ; reduced about one fifth. No. 18,736, Collection in the U. S. Nat. 

 Museum. See Figs. 31, 32 and others of Plate VI. Same skeleton. 



Fig. 43. Palmar aspect left pectoral limb of Phalacrocorax urile. Reduced 

 about one fourth. From the same skeleton that furnished the skull shown in 

 Fig. 15, Plate IV., and the trunk skeleton shown in Figs. 22 and 23, PI. V. 



Fig. 44. Inner aspect of the right pelvic limb of Phalacrocorax urile. Reduced 

 about one fourth from the same skeleton that furnished the pectoral limb 

 shown in Fig. 43. 



Plate XXIX. (Skull, including mandible of Fregata aqidla. No. 18,485 of the Coll. U. S. 

 Nat. Museum. Adult. All slightly reduced ; Fig. 46 more so than the others.) 

 Total length of skull 17.3 centimeters, and ramus of mandible 16.5 cm. 

 Fig. 45. Left lateral view of the skull ; mandible detached. 

 Fig. 46 Superior view of the skull ; mandible removed. 

 Fig. 47. Superior view of the mandible. 



Fig. 48. Basal view of the skull; mandible removed. For other bones of 

 the skeleton of this individual see Plate I., Fig. 4; Plate VI., Figs. 24, 26 ; 

 Plate X., Figs. 50 and 51. In Fig. 48 the right quadrate bone and the 

 pterygoid of the same side have been removed. 



Plate XXX. Fig. 49. Ventral aspect of the pelvis of Pelecanus sharj)ei ; considerably re- 

 duced. The longitudinal median line of the vertebral portion of this bone 

 measures about 19.5 em. It is from the same skeleton that furnished the 

 bones shown in Plate VII. 



Fig. 50. Ventral aspect of the sternum and shoulder-girdle of Fregata aquila; 

 slightly reduced. See remarks under Fig. 48, PI. IX. 



Fig. 51. Left lateral aspect of the sternum of Fregata aquila. Natural size. 

 See remarks under Plate IX. and Fig. 48. 



