REPORTS ON EXCURSIONS. 163 



the Druidical altar theory; and Wilson's Prehistoric Annals of 

 Scotland, page 66, who, while advocating the '■ cromlech " 

 theory, erroneously calls " the huge capstone a block of basalt.") 



Ailsa Craig was visited on the Queen's Birthday, 24th May, 

 in conjunction with the Andersonian Naturalists' Society; 

 Cumbernauld Glen, on 2nd June, along with the Airdrie 

 Natural History Society; Pollok, on 5th June; Howietoun 

 Hatchery, Stirling, on 9th June, in company with the Edin- 

 burgh Field Naturalists' and Microscopical Society; Castlemilk, 

 Rutherglen, on 12th June; Glenfalloch, in conjunction with 

 the Geological Society, on 16th June; Tollcross Park, on 26th 

 June; but nothing of special interest falls to be recorded of 

 these excursions. 



Ben Lomond, 30th June, 1900. — This was a joint-excursion 

 with the Geological Society and the Edinburgh Field Naturalists' 

 and Microscopical Society. The following plants were observed : 

 — Habenaria conopsea, Benth. ; Myrica gale, L. ; Listera cordata, 

 L., at 600 feet; Thalictrum alpinum, L., 1,000-2,900 feet; 

 Rubus chamcemorus, L., 1,900-2,100 feet ; Gnaphalium supinum, 

 L. ; Potentilla sibbaldi, Hall. ; Armeria maritima, Willd., 

 2,300-2,900 feet; Silene acaulis, L., 2,700 feet, in fine flower; 

 and on the summit. 3,192 feet, Saxifraga nivalis, L., in flower; 

 Luzula spiceta, L. ; Cochlearia alpina, Wats. ; Saxifraga rhodiola, 

 D.C. ; S. hypnoides, L., all from 2,800 feet; S. stellaris, L., from 

 1,900 feet to the summit ; Phyopteris dryopteris, Fee, in flower at 

 3,900 feet; P. poh/podioides, Fee, very large at 600 feet; Poly- 

 gonum viviparum, L., at 2,700 feet, in flower ; one plant of 

 Juncus triglunus, L. 



Ross Priory, 4th August, 1900. — This excursion was under- 

 taken in conjunction with the Andersonian Naturalists' Society, 

 the conductor being Mr. George Herriot. After visiting the 

 family burial-ground, the party was conducted over the estate 



