On sonic Birds from the N. W. of America. 357 



albis; capite, collo suprd^ caaddque pallidissime griseis ; remigibus 

 nigris. 



Rostrum j^ec/e^que nigri. Longitude corporis, 18; rostri, 4; alcB a 

 carpo ad remigem Imam, 7 J ; caudal, 3 J ; tarsi, 4. 



This bird was found in abundance at San Francisco. 



Anas urophasianus. 



.^nas capite corpora cauddque pallida rufis, illis brunneo ocellatis; 

 genis, guld, colloque infra albis; alis fuscis, specula fasciis quatuor, 

 prima gracili rufd, secundd lata dilute cceruled, tertid gracillimd atrd, 

 quartd lata rufd, efformato. 



Capitis maculae parvse, nuchce pectorisqne, paullo grandiores, abdo- 

 minis subgrandes. Scapular es fuscse, rufo-marginatse. Dorsum imum 

 fuscescens. Tectrices alarum inferiores, primae brunneae, secundariae 

 albae. Plumes axiliares albae. Longitudo corporis, 21^; rostri, 2, 

 aZ(£ a carpo ad remigem 2dam, 9J; caudce, 5J; tarsi, 1^. 



A species closely allied in form to our ^n. acuta, or Sea Pheasant. 



Uria brevirostris. 



Uria supra griseo-fusca^ capite dorsoque albo notatis; subtus alba, 

 fusco undulatim maculata ; rectricibus albis, duabusmediis-fusco notatis; 

 rostro brevi gracili. 



Al(B supra et infra, iecirice^que inferiores fuscae. Rostrum nigrum. 

 Pedes flavi membranis unguibusque brunneis. Longitudo corporis, 9 ; 

 rostri ad frontem, J, ad rictum, 1^ ; alcB a carpo ad remigem Imam, 

 5 J ; caudcB, 1 ; tarsi, J. 



This bird, shot at San Bias, presents a new form among the Alcadcs. 

 The bill is short and slender, the mandibles not being above half 

 an inch in length, although the extent ot the mouth, when measured 

 from the rictus is equal to that of a Guillemot of equal size. The form 

 is most near to that of Uria, where I shall place the species provisionally. 

 The specimen is apparently that of an immature bird. The adult I ori- 

 ginally suspected to have been the Uria marmorata of Dr. Latham. We 

 have, however, no specimen of that species in this country to which I 

 can refer : and neither the plate of it in the " Synopsis'' nor the accom- 



