396 Annals of the Carnegie Museum. 



Plate XX. 



Fig. 21. Left lateral view of the skeleton of a specimen of the " Diving 

 Petrel" (Pelecanoides urinatrix). Adult; nat. size. Coll. U. S. Nat. Mus., 

 No. 1 877 1. Taken in New Zealand waters by Mr. C. F. Adams. Right pec- 

 toral and pelvic limbs detached ; also the hyoid arches. Trunk skeleton par- 

 tially rotated, admitting of a view of the anterior of the pelvic basin. Nat. 

 size. 



Fig. 22. Bones of the hyoid arches seen upon dorsal aspect. Belong to the 

 skeleton shown in fig. 21 of this plate. Nat. size, and normally articulated. 



Fig. 23. Skeleton of the right pectoral limb of the same specimen shown 

 in fig. 21. Ventral view; nat. size. 



Fig. 24. Skeleton of the right pelvic limb of the same specimen shown in 

 fig. 21; mesial aspect; nat. size, and normally articulated. 



