442 



G. E, Yerrill — Some Birds and Eggs collected at 



yellowish white at basej gradually darkening towards the tips, which 

 are black. Tail, dark grayish brown, shafts yellowish white. Entire 

 under surface, rump and upper tail coverts, pure white. The extreme 

 base of the culmen does not reach to the feathers of the forehead, 

 but is separated by a narrow strip of naked skin and is bordered by 

 a very narrow line of dark brown. From where the brown ceases 

 the culmen is bright yellow, gradually deepening in tint and becom- 

 ing orange, at about two-thirds the distance from the base, and 

 finally dull red at the unguis, the extreme tip of the mandible being 

 horn color. All the rest of the bill is pure black, except the extreme 

 outer end of the lower mandible, which is light horn color. Feet 

 and legs light, said to be " white " in life. 



The following table gives very careful measurements of our two 

 specimens of eximius, and also measurements of the two most closely 

 allied species, taken from the best descriptions I have at hand, 

 namely : Gould's original description of cuhninatiis (P. Z. S., 1843, 

 p. 107) ; Coues' monograph of the Procellariidce (Proc. Acad. Nat. 

 Sci. Phil. 1866, pp. 183 et seq., and Ridgeway's Manual of N. A. 

 Birds (pp. 52, 53). 





T. 



culmi/iatus. 



T. 

 eximius. 



T. 



chlororhynchv^. 



Comparative measurements. 



From 



Gould, 



Coues and 



Ridgeway. 



Skin. 



Skeleton. 



From Coues 



and 



Eidtjeway. 



Chord of culmen ... 



Depth of bill at base 



4-35-4-50* 

 1-70-1-75 



1-25 



MO 



]-20 



4-62 

 1-61 

 1-00 

 0-88 

 1-02 

 0-40 

 0-30 

 4-49 

 •66 

 4-35 

 0-45 

 3-75 

 0-49 

 3-05 

 19-25 

 8-5 



4-40 

 1-54 

 0-97 

 0-88 

 0-95 

 0-40 

 0-30 

 4-44 

 •56 

 4-32 

 0-35 

 3-75 

 0-42 

 3-07 



4-50 

 1-50 



Depth of bill at unguis 



Least depth of bill (near middle) 



Width of bill at base 



Greatest width of culmen (at nostrils) 

 Width of culmen at unguis 



i-oo 



100 







Middle toe with claw . 



5-OOf 



4-25 



Middle claw 





Outer toe with elaw _.. 



4-75 



4-00 



Outer claw 





Inner toe with claw 



4-25 



3-75 



Inner claw . 





Tarsus _ . 



3-25:J: 



200-21-0 



8-0-9-0 



2-75 



Wine: 



190 



Tail 





7-0 









* "Bill, 4i," Gould; culmen 4-7, Sharpe. 

 f Without claw, 4-30-4-35, Ridgeway. 

 X 2-8, Sharpe, Zool. Kerg., p. 147. 



