116 TRANSACTIONS OF THE [Sess. lxxxv 



bluntly tiibercled, pale 3^ellowish -white. I found no plants 

 of this species growing on the stony bottom of the shallow 

 w^ater along the margin of tlie loch, where flowerless plants 

 of LiTTORELLA LACUSTRis, Li'iin., grow in abundance. 

 Confirms the late Mr, Robert Heddle's record of this 

 species from Rousay, in " Scot. Nat.," No. iii, new series, 

 p. 113 (January 1884); and the late Mr. Alexander 

 Somerville's record of it from Peerie Water, Rousay, 12th 

 July 1901, in Bennett, " Suppl. Top. Bot.," p. 114 (1905), 

 and in " Trans. Bot. Soc. Edin.," vol. xxvii, p. 58 (1916). 

 See " Annals Scot. Nat. Hist.," No. 84, p. 107 (April 1900) ; 

 and Spence, ■' Flora Orcadensis," p. 96 (1914). The late 

 Dr. A. R. Duguid recorded Isoetes lacustris, Linn., from 

 the Loch of Carness, Saint Ola, Mainland, in his manuscript 

 '■ Flora Orcadensis," (1858), but this record is most probably 

 an error, because the Loch of Carness is a tidal one and 

 contains brackish water, and on 16th September 1921 I 

 failed to find either this species or LiTTORELLA LACUsTRis, 

 Linn., in the loch. 



Chaka contraria, Kiltzing (fide James Groves). — 

 Gravelly mud at bottom of shallow running water in a 

 burn, 200 feet above sea-level, Quendale, Rousay, 15th June 

 1921, H. H. Johnston ; mud at bottom of water, 5 feet deep, 

 in a loch, 28 feet above sea-level. Loch of Bosquoy, Harray, 

 Mainland, 30th September 1921, H. H. Johnston; and 

 shell-sandy mud at bottom of water, 1| foot deep, in a 

 loch, 10 feet above sea-level, North Loch, Lady, Sanday, 

 8th October 1921, H. H. Johnston. Native. Rare at 

 Quendale, and common in the Loch of Bosquoy. Plants 

 slightly fetid, wholly submerged in water, and at the Loch 

 of Bosquoy and North Loch they were in fructification. 

 In a sheet of Chara aspera, Willd., collected by the late 

 Mr. F. C. Crawford, in the Loch of Skaill, 8andwick, 

 Mainland, Orkney, in September 1901, and now in the 

 herbarium of Mr. James Groves, there are a few scraps 

 of Chara contraria, Kiltzing (fide James Groves). A 

 new record for this species for H. C. Watson's county 

 No. J II Orkney. 



Chara contraria, Kiltzing, var. h. hispidula, Braun. 

 (fide James Groves). — Mud at bottom of water, 3 inches 

 deep, in a pool, 62 feet above sea-level. The Loons, Birsay, 



