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Show 1887.] THE FAUNA OF COREA. 593 An immature specimen which in no way diners from specimens captured off the coasts of Italy. 45. LARUS CRASSIROSTRIS, Vieill. Larus melanurus, Temm. Pl. Col. 459 (1838). Larus crassirostris, David et Oust. Ois. Chine, p. 519 (1877). «, b, c. Olga Bay, September 1879. d. Port Lazaref, August 14th, 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 margined with ochraceous. Specimen e is fully adult in summer plumage, with head and neck pure white. 46. CEPPHUS CARBO, Pall. Cepphus carbo, 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. pl. 71. «, 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 British 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 slightly 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. Specimen 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. W e were very doubtful as to the determination of these birds, considering how they differ from C. 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. W e add a brief description of our birds, for it does not appear that the immature garb of C. carbo has ever been described Suprafusco-niger,paullum nitens; gula alba, collo anticofusco-nigro, pectore et abdomine albis, plus minusve nigro-variis j alis, cauda et tibiis fusco-nigris ; subalaribus griseis ; rostro nigro, pedibus in exuvie rubescentibus. Long. tot. circa 0*340 m.; al. 0*160 m. ; caud. 0*050 m.; rostri culm. 0*032 m.; tarsi 0*034 m. |