6. (KSTUELVTA. 409 



13. (Estrelata hypoleuca. 



CEstrelata hypoleuca, Salv. Ibis, 1888, p. 359 ; Seeb. P. Z. S. 1889, 



p. 586,^890, p. 105 ; id. B. Japan. Emp. p. 269 (1890). 

 -(Estrelata hypoleuca, Stejn. Pr. U.S. Nat. Mus. xvi. p. 017 (1893). 



Adult. Similar to ffi". torquata, but rather larger, the bill being 

 distinctly stouter. The feathers of the back are more distinctly 

 edged with grey, and there is less white on the under wing-coverts ; 

 the under surface is wholly white. Total length about 13 inches, 

 wing 9 ; tail, central rectrices 4-6.5, lateral rectrices 3-2 ; bill 1-3, 

 tarsus 1-1, middle toe 1-3.5, outer toe a little shorter, inner toe 1-15. 



Hab, North Pacific Ocean. 



a. Ad. sk. Krusenstern Is., N. Pacific Seebohm Coll. (Tj-pe 



(//. J. Snow). of the species.) 



b. Ad. ; c. Pull. Nakaudoshima, Benin Is., Seebohm Coll. 

 sk. May 14, June 10, 1890 



(P. A. Hoist). 



14. (Estrelata nigripennis. 



(Estrelata cooki, Chee&eman, Trans. N. Z. Inst, xxiii. p. 224 (1891) 



{7iec Gray, fide Hutton). 

 (Estrelata uigiipennis, Rothsch. Bull. Orn. Club, i. p. Ivii (1893) ; 



id. Ibis, 1893, p. 571 ; Hutton, P. Z. S. 1893, p. 750 ; Btdler, Tr. 



N. Zeal. Inst, xxvii. p. 123 (1895). 



Adult. Upper surface slaty-grey, with a dark patch on the rump, 

 the feathers of the head and sides of the neck narrowly edged with 

 white, the feathers of the anterior portion of the crown with black 

 discs and white edges, the forehead and lores being nearly pure 

 white, a superciliary spot white, area round the eye dark blackish 

 grey ; whole under surface pure white, the sides of the breast slaty- 

 grey ; scapulars and wings black, the larger coverts grey, with very 

 narrow white margin ; under surface of the wings white, with a 

 wide dark border, the outer primaries black, showing a little white 

 on the exposed portion close to the coverts ; tail greyish black, 

 outer rectrices white on their inner webs nearly to the tip, outer 

 web mottled with grey. Total length about 12-5 inches, wing 8-7, 

 tail 4-1, tarsus 1-2, middle and outer toes 1-3, inner toe 1"1. 



I/ab. Kermadec Is., South Pacific Ocean. 



There are several specimens of this species in the Hon. Walter 

 Rotlischild's collection. 



a, b. Ad. sk. Kermadec Is. Hon. W. Rothschild [P.]. 



(Typical specimens.) 



15. (Estrelata brevirostris. 



Procellaria lugens, Banlis, Icon. nos. 21, 22 {aimd Kuhl) ; cf. Salv. in 



Bowlei/'s Orn. Misc. i. p. 235 (1876). 

 Procellaria grisea, Kuhl, Beitr. Zuol. p. 144, f. 9 (1820) (ncc Gm.) ; 



Sc/il. 3Ius. P.-B., vi. Procell. p. 12 (1803). 

 Procellaria brevirostris, Less. Traitd d'Orn. p. 611 (1828) ; Gray, 



Gen. Birds, iii. p. 648 (1844) ; id. List Anseres Brit. Mus. p. 163 



(1844). 



