24 Mr. H. Seebohm on Messrs. Blakiston and Fryer's 



skins of L. glaucescens , Licht.^ obtained by Capt. Blakiston 

 at Hakodate. 



67. Larus occidentalism And. 



Mr. Howard Saunders informs me that the skins in S win- 

 hoe's collection from Japan^ labelled L. occidentalis, were 

 certainly not that species, but were the Mediterranean Her- 

 ring-Gull, L. cachinnans, Pall. 



L. affinis, Reinh., has not yet been recorded from Japan; 

 but there cannot be much doubt that it passes the coasts of 

 the Japanese islands on migration, since the Museum of St. 

 Petersburg possesses skins of this species collected both in 

 spring and autumn by Wosnessensky at Ayan on the sea of 

 Ochotsk. 



68. Larus niveus, Pall. 



Mr. Howard Saunders informs me that the Gulls from 

 Japan attributed to this species by Swinhoe are undoubtedly 

 Larus canus, Linn. 



69. Larus marinus, L. 



Skins of this Gull collected by Capt. Blakiston in Japan 

 have been carefully identified by Mr. Howard Saunders. 



70. Larus tridactylus, L. 



Skins of Rissa tridadyla (Linn.) from Japan have not yet 

 found their way to this country. 



71. ChROICOCEPHALUS RIDIBUNDUS (L.) . 



Mr. Howard Saunders gives Japan as a Avinter residence 

 only of Larus I'idibundus, Linn. (P. Z. S. 1878, p. 201). On 

 the other hand, Capt. Blakiston's observations seem to prove 

 that this bird is only a summer visitor to Yesso (Ibis, 1874, 

 p. 165; and 1878, p. 217). 



Larus leucopterus, Faber, must also be added to the Japa- 

 nese list, on the authority of a skin collected by Capt. Bla- 

 kiston and identified by Mr. Howard Saunders (P. Z. S. 

 1878, p. 166). 



We must also include Larus delaivarensis, Ord, on the 

 authority of a skin in the collection of Mr. Howard Saun- 

 ders, obtained by Mr. H. Whitely at Hakodate (P. Z. S. 

 1878, p. 177). 



