1887.] THE FAUNA OF COREA. 593 



An immature specimen which in no way differs from specimens 

 captured off the coasts of Italy. 



45. Larus crassirostris, Vieill. 



Larus melanurus, Temm. PI. Col. 459 (1838). 



Larus crassirostris, David et Oust. Ois. Chine, p. 519 (1877). 



a, h, c. Olga Bay, September 1879. 



d. Port Lazaref, August Nth, 1880. 



e. Gensan, August 17th, 1880. 



The first three specimens are fully adult ; a and b have the nape 

 and occiput tinged with grey, while in c the vertex and also the 

 sides of the neck are greyish brown. Specimen d is evidently a 

 young bird of the year, dusky above and beneath, with the feathers 

 of the upper parts m.argined with ochraceous. Specimen e is fully 

 adult in summer plumage, with head and neck pure white. 



4C. Cepphus carbo, Pall. 



Cepphus carlo, Pall. Zoogr. Ross.-As. ii. p. 350 (1811); Stejn. 

 Pr. U.S. Nat. Mus. vii. p. 224 (1884); id. Bull. U.S. Nat. Mus. 

 no. 29, p. 22(1885). 



Uria carbo, Gould, B. of Asia, vii. pi. 71. 



a, b, c, d. Olga Bay, 15th September, 1879. 



Not feeling quite sure of the determination of these birds, we sent 

 specimens a and b to Prof. Alfred Newton, who kindly compared 

 them with the specimens preserved in the Britisli Museum ; he 

 wrote to say that they agreed in every essential with a specimen 

 from Hakodate (Japan), slightly more adult, rightly labelled as 

 C carbo. Thus Prof. Newton does not hesitate in referring the 

 Olga Bay specimens to that species. 



All our birds appear to be immature and show their upper parts 

 of a shiny black, whilst the underparts are white more or less varied 

 with blackish, the tips of the feathers being blackish : this character 

 is more marked in specimen a, which being also shghtly larger may 

 be considered to have been more adult ; it is more blackish on the 

 flanks and in the median region of the breast and abdomen. Speci- 

 men b has the middle of the breast and abdomen pure white, only 

 the feathers on the flanks having blackish tips ; it is also smaller ; the 

 feet are also smaller and dark, not showing traces of red. 



We were very doubtful as to the determination of these birds, 

 considering how they differ from G. carbo in their white underparts, 

 their smaller dimensions, their lacking the white space on the sides 

 of the head, and in the grey colour of the under wing-coverts. 



We add a brief description of our birds, for it does not appear 

 that the immature garb of C. carbo has ever been described 



Supra fusco-mger,paullum nitens; gula alba, collo anticofusco-nigro, 

 pectore et abdomine albis, plus minusve nigro-variis ; alis, cauda 

 et tibiis fusco-7iigris ; subalaribus griseis ; rostro nigro , pedibus 

 in exuvie rubescentibus. 



Long. tot. circa 0-340 m.; a/. 0-160 m.; caud. Q-QbO m.; rostri 

 culm. 0-032 m, ; tarsi 0-034 m. 



