HYPOTHETICAL: BiSt,. 
Containing species for which we have some, but not conclusive, evi- 
dence of their occurrence. 
(1) 13. Fratercula arctica (Linn.).. Purrin.—Dr. Wil- 
liam C. Rives in his paper says “if I am not mistaken have been 
found here” (Newport).! 
(2) 42. Larus glaucus Briinn. Gtaucous GuLi. Burgo- 
master. — Included in Col. Powel’s list.? 
(3) 62. Xema sabinii (Sab.). Sapine’s Guy. Forked- 
tailed Gull. — Included in Col. Powel’s list.® 
(4) 63. Helochelidon nilotica (Hasselq.). Marsu Tern. 
Gull-billed Tern.— Included in Col. Powel’s list* as taken near 
Newport. 
(5) 159. Somateria mollissima borealis C. L. Berhm. 
NORTHERN EIDER. Greenland Eider. There was found in the 
collection of Mr. R. L. Agassiz who made the greater part of his 
collection at Newport, a bird in a tray with two King Eiders 
(Somateria spectabilis) taken at Newport in December, 1885, and 
although without a label, probably taken with these two birds. 
The specimen is now in the collection of the Museum of Com- 
parative Zoology, Cambridge, Mass. 
(6) 211. Rallus crepitans Gmel. CLapper Rai. — In- 
cluded in Col. J. H. Powel’s List.® 
1 Rives’ List, p. 41. 
? Col. Powel’s List, p. 42. 
3 Col. Powel’s List, p. 42. 
4 Col. Powel’s List, p. 42. 
5 Col. Powel’s List, p. 42. 
* Coues and Stearns’s, New Eng. Bird Life, Part II, p. 279. 
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