166 NOTES OF A TOUR IN N. SCOTLAND. 



invariably with globose sporangia, and with violet-grey spores of the 

 same colour as those of the Ceylon specimen and marked with 

 similar scattered warts, confirms the integrity of the species ; it 

 must, however, be transferred from the genus Didymium, in which 

 Berkeley placed it, to Diachcea. 



The camera lucida drawings in the plate (PL 386, figs. 6, 7, 

 8, 9, 10), taken with a J-^-inch immersion lens, show the difference 

 of spore-sculpture which distinguishes the five recorded species 

 of Diachcea. 



Description of Plate 386. — 1. Didymium Trochus. 2. Physarum strami- 

 nipes. 3. Badhamia ovispora. 4. Spore of Physarum didermoides var. lividum, 

 collected at Chaul End, x 600. 5. Spore of P. didermoides, collected at Mead 

 Hook Farm, x 600. 0. Spore oiDiachoea elegans x 600. 7. Spore of D. splen- 

 dens X 600. 8. Spore of D. Thomasii x 600. 9. Spore of D. subsessilis x 600, 

 referred to Journ. Bot. June, 1897, p. 213. 10. Spore of D. hulUllosa x 600. 



a, sporangia x 20 ; 6, capillitium and spores x 280 ; c, spore x 600 ; d, crystals 

 of outer sporangium-wall x 280 ; e, crystals in the columella x 280. 



NOTES OF A TOUK IN N. SCOTLAND, 1897. 

 By Rev.E. S.Marshall, M.A.,F.L.S.,&W. A. Shoolbred,M.R.C.S. 



The undermentioned plants were observed between July 14th 

 and August 12th. A day was spent in working the coast of Thurso 

 Bay, Caithness (109), via Scrabster to Holbura Head. We stayed 

 a short time at Melvich, W. Sutherland (108), and passed five days 

 at Betty Hill very pleasantly, Tongue and its neighbourhood after- 

 wards occupying our attention for nearly a fortnight. The grand- 

 looking corries on the east side of Ben Hope disappointed us ; but 

 Ben Laoghal (about as fine a hill as there is in Scotland, though 

 not of any great height) produced several things of considerable 

 interest. A brief sojourn at Altnaharra, where we were nearly 

 devoured by midges, enabled us to add Carex cJiordorrhiza to the 

 British Flora, and we believe that this place is well worth exploring 

 systematically. Thence we journeyed southward to Golspie, E. Suth- 

 erland (107), and Tain, E. Ross (106) ; finally breaking our journey 

 for a few hours at Dunphail, Inverness-shire, which is in Watson's 

 v.-c. 95, Elgin. With the exception of the last two days, we had 

 an almost unbroken spell of fine weather, and managed to collect a 

 good many rare or critical species. Particular attention was paid 

 to the forms of Hieracium and Euphrasia, in which this part of the 

 country is decidedly rich. 



The sign "^^ denotes a new vice-comital record ; t an apparently 

 new British plant. 



We are indebted for much kind help in determining doubtful 

 specimens to Messrs. Arthur Bennett, Crepin, H. & J. Groves, 

 Hanbury, Klikenthal, E. F. Linton, G. Nicholson, Rogers, and 

 Prof. Wettstein. 



