HYPOTHETICAL LIST. 327 



Family FROCELLARIID.S. 



5. Puffinus kuhlii (Boie). 



Cinereous Shearwater. 



Procellaria kuhlii BoiE, Isis, 1835, 257. 

 Puffinus kuhlii'Bo^w. Consp. II. 1856, 202. 

 [B 651, C 596, R 708, C 831.] 

 An Eastern Atlantic species, of which no American specimens are 

 known to exist in collections. 



6. Oceanodroma hornbyi (Gray). 



Hornby's Petrel. 



Thalassidroma hornbyi Gray, P. Z. S. 1853, 62. 

 Oceanodroma hornbyi Bonap. Consp. II. 1856, 195. 

 [B641, Cs92, R727, C827.J 

 A very distinct species, of which only one specimen has been 

 obtained, the alleged locality being the " northwest coast of America." 



Family PHALACROCORACID^. 



7. Fhalacrocorax perspicillatus Pall. 



Pallas's Cormorant. 



Phalacrocorax perspicillatus Pall. Zoog. Rosso- As. II. 1826, 305. 

 [B621, C533, R648, €756.] 

 Believed, on good evidence, to be now extinct, as it unquestion- 

 ably is in the locality (Bering Island) where originally discovered. 

 Only four specimens are known to exist in collections, — two in 

 the St. Petersburgh Museum and one each in the Leyden and 

 British Museums. Even if existing, it has no valid claim to a place in 

 the North American fauna. {Cf. Stejn. Pr. U. S. Nat. Mus. VI. 

 1883, p. 65.) 



Family ARDEID^. 

 9. Ardea Tvuerdemanni Baird. 



Wurdemann's Heron. 



Ardea wurdemanni Baird, B. N. Am. 1858, 669. 



