LAND AND FRESHWATER MOLLUSCS OF ST. KILDA 21 



abundant amid the turnips and potatoes. The first of the 

 immigrants was observed, however, on 3rd September ; and 

 the last, an immature bird, was obtained on 4th October. 



YELLOW-BROW KL> WARBLER, Phylloscopus superriliosiis. Among the 

 most interesting of the many migrants which came under our 

 notice on 25th September was a male of this pretty little 

 Siberian species. This I had the good fortune to obtain 

 among a patch of potatoes. I found it by no means a con- 

 fiding bird, but, on the other hand, an extremely restless one ; 

 and though I recognised it at once, I was for a time very 

 doubtful if I should succeed in securing it for the Museum 

 collection. The only previously known Scottish specimen was 

 obtained within sight of Fair Isle, namely, at Sumburgh Head, 

 Shetland, and at an almost identical date, so far as the day and 

 the month are concerned, i.e. on 24th September 1886. 



REDBREAST, Erithacus rubeciiLi. The first Redbreasts were observed 

 on the morning of 23rd September, when a number were seen 

 singly in all parts of the island. These immigrants were 

 remarkably wild, and would not permit of a close approach. A 

 further arrival was manifest on the 25th, when not a few 

 skulked among the cover afforded by the turnips and potatoes, 

 while others were found in the wilder portion of the island. 

 After this date a few were seen down to the end of September, 

 and one on 4th October. This species, according to the 

 Fauna, appears to be a very uncommon bird in the Shetlands. 



BLUETHROAT, Cyanecula suerica. A young male of the year was 

 obtained by Kinnear, among cabbages, on 25th September : 

 being one of the rarer species which participated in the great 

 movement witnessed on that day. This bird is new to the 

 fauna of the Northern Isles, not having been previously detected 

 in either the Shetland or Orkney groups. This interesting 

 specimen has been presented to the collection of Scottish birds 

 in the Royal Museum, Edinburgh, by its fortunate captor. 



(To lie con fi nued.} 



LAND AND FRESHWATER MOLLUSCS OF 



ST. KILDA. 



By JAMES WATERSTON, M.A., and J. \V. TAYLOR. 



A CONSIDERABLE portion of the time given to field work was 

 spent on this group, with the result that a relatival}- large 

 number of species was taken. St. Kilda was at a com- 



