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



alhis; capite, collo suprd, cauddque pallidissimc griseis; remigibus 

 nigris. 



Rostrum j9ec/e.5que nigri. Longitude corporis, 18; rostri, 4; a!ce a 

 carpo ad reraigem Imam, 7^ ; caudce, 3^ ; tarsi, 4. 



This bird was found in abundance at San Francisco. 



Anas urophasianus. 



Anas capite corpore cauddque pallide rufis, illis hrunneo ocellatis; 

 genis, guld, colloque infra alhis; alis fuscis, speculo fasciis quatuor, 

 prima graeili rufd, secundd latd dilute ceeruled, tertid gracillimd atrd, 

 quartd latd rufd, efformato. 



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

 minis subgrandes. Scapidarcs fuscae, rufo-marginatse. Dorsum imum 

 fuscescens. Tectrices alarum inferiores, primae brunnese, secundaria 

 albse. Plumce axil/ares albse. Longitude corporis, 21^; rostri, 2, 

 a/ffi a carpo ad remigem 2dam, 9^; caudce, 5^; tarsi, \~. 



A species closely allied in form to our An. 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 graeili. 



Alee supra et infra, tectrieesqMQ inferiores fuscae. Rostrum nigrum. 

 Pedes flavi membranis unguibusque brunneis. Longitudo corporis, 9 ; 

 ro5<ri ad frontem, ^, ad rictum, 1|; alcB a carpo ad remigem Imam, 

 5 J ; caudce, 1 ; tarsi, ^. 



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

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

 an inch in length, although the extent of 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- 



