observed on the Yenisei River. 519 



158. *Larus affinis. 



I have nothing to add to my notes of 1895 concerning this 

 Gull. 



159. Lakus fuscus. 



No further example of the Lesser Black-backed Gull was 

 obtained in 1897. 



160. LaRUS MARIN us? 



No Gulls resembling L. marinus were observed in 1897. 



161. ^ Larus glaucus. 



The Glaucous Gull does not occur south of Golchika. 

 Eggs were taken from a nest on a ledge of rock on one of 

 the islands in the mouth of the river. There was only this 

 one pair of Glaucous Gulls amongst a large colony of 

 L. affinis nesting on the island. 



162. "^Stercorarius pomatorhinus. 



I stopped on my way north on June 27th at the island 

 where we found Pomatorhine Skuas nesting in 1895^ on 

 purpose to look for them again, but there were no 

 Skuas there ; nor were any to be seen when I revisited the 

 island on July 25th on my return journey. A single bird 

 at Doodinka was the sole representative of the species seen. 



163. "^Stercorarius crepidatus. 



E-ichardson^s Skuas appeared to be the only Skuas nesting 

 in 1897 on the Yenisei, and of these but two nests were 

 found. 



164. *Stercorarius parasiticus. 



Although we frequently found the nests of Buffon's 

 Skuas on my previous journey, we saw nothing of them on 

 this occasion, excepting at Golchika, when a flock of twenty- 

 two passed over on June 29th. I am convinced they were not 

 breeding this year, owing to the almost complete absence of 

 lemmings ; and this may also account for the absence of 

 S. pomatorhinus. 



165. COLYMBUS ADAMSI. 



A Siberian merchant, living at Karaool, gave me a skin 



