310 THE SCOTTISH NATURALIST 



being not quite adult, and the years they take to arrive at the breeding 

 state. He gives Black-headed Gull and Kittiwake as at 36 

 months, Common Gull 60 months, but possibly 48. In the 

 majority of cases I think he is correct as regards the two former, 

 but I should not have put the Common Gull at so old an age. 

 I can only add that all breeding birds which have come under 

 my notice in all three species were fully adult birds. I may add 

 that Blake-Knox was the first to give good definite reasons for 

 rejecting Lams capistratus as a good species. — Claud B. Tice- 

 HURST, Lowestoft. 



The Fulmar on the South-east Coast of Scotland in 

 Summer. — On a precipitous part of the Berwickshire coast to the 

 north of St Abb's Head, a Fulmar Petrel was seen by Mr Harold 

 Raeburn on 13th June this year, flying to and fro among the 

 Herring Gulls which breed there. Mr Raeburn having kindly 

 reported the occurrence to me, I visited the locality on the i6th in 

 the hope of finding the bird still in evidence, but did not succeed. 

 Last year, as recorded in this magazine (19 14, p. 199), a Fulmar 

 was twice seen close to the May Island in May. Possibly these 

 summer occurrences are indicative of an approaching extension of 

 the breeding range of this species on the east coast of Scotland, but 

 that remains to be seen. Meantime there is a danger of attaching 

 too much importance to the occurrence of a few odd birds at the 

 mouth of the Forth during the summer months. Though most of 

 the Fulmars that have been obtained in the Forth and adjoining 

 waters have occurred in autumn and winter, the following summer 

 records have been noted : one at the east sands, St Andrews, 

 6th July 1867 ; one off North Berwick, 6th June 1888; and one at 

 Canty Bay, 17th July 1908. — William Evans, Edinburgh. 



New Records of Fresh-water MoUusca from Ross-shire. — 



Some specimens of the fresh-water genus Pisidiuin from Gairloch, 

 Ross-shire, in the collections of the Royal Scottish Museum were 

 recently recorded in the Journal of Conchology (vol. xiv., 1915, p. 

 312) as "Census Authentications" under the names of Pisidium 

 obtusale and P. nifidum. The records were repeated in the Scottish 

 Naturalist for June, p. 144. Since the specimens, as re-examined, 

 returned to the Museum bearing the manuscript names oi P. obtusale 

 and P. milium, it was clear that some slip in the recording had taken 

 place. The specimens have been submitted to Mr B. B. Woodward, 

 who has recently monographed the genus in his " Catalogue of the Jj 



British Species of Pisidium in the Collection of the British Museum " *l 



(19 1 3). As a result of examination of the internal -as well as the 



