69 



HYPOTHETICAL LIST. 1 



1. ^ECHMOPHORUS CLABKII (LAWR.) 



Clark's Grebe. [B 705, C 6iSa, R 730, C 846.] 



2. CEPPHUS MOTZFELDI (BENICK.). 



Black-winged Guillemot. [B , C , R , C .] 



3. CEPPHUS CARBO PALL. 



Sooty Guillemot. [B 728, C 633, R 762, C 873.] 



4. XEMA (CREAGRUS) FURCATA (NEB.). 



Swallow-tailed Gull. [B 679, C 559, R 678, C 791.] 



5. DIOMEDEA EXULANS (LINN.). 



Wandering- Albatross. [B , C , R , C .] 



6. PUFFINUS KUHLII (BoiE). 



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



7. OCEANODROMA HORNBYI (GRAY). 



Hornby's Petrel. [B 641, C 592, R 727, C 827.] 



8. PHALACROCORAX PERSPICILLATUS PALL. 



Pallas's Cormorant. [B 621, C 533, R 648, C 756.] 



9. ARDEA WUERDEMAXNI BAIRD. 



Wurdemann's Heron. [B 488, C 450, R 486 part, C 656 part.} 



10. ARDEA (DICHROMANASSA) PEALEI BONAP. 



Peale's Eg-ret. [B 482, C 355 part, R 491 part, C 661 



11. TRINGA (ACTODROMAS) COOPERI (BAIRD). 



Cooper's Sandpiper. [B 527, C 422, R 535, C 618.] 



i Consisting of species which have been recorded as North American, but whose status as 

 North American birds is doubtful, either from lack of positive evidence of their occurrence 

 within the prescribed limits of the present Check-List, or from absence of satisfactory proof of 

 their validity as species. 



