TJie Scottish Naturalist. 19 



its long, slender, setaceous leaves, frequently floating on the 

 surface of the water, was at one time referred to Isoetes setacea^ 

 Bosc, but has now been described (' Journal of Botany,' Decem- 

 ber 1878) as a new species, under tlie name /. Morei Moore, in 

 honour of Dr Moore's fellow-worker Mr A. G. More. 



Dr M. C. Cooke read a paper upon the species of Corticiiim 

 and Stercum, of which he had been examining the minute struc- 

 ture. He described characters which he thought warranted the 

 generic separation of several of the species ; and he proposed to 

 establish a new genus — PeniopJiora. It is questionable if the char- 

 acters pointed out by Dr Cooke are of more than subgeneric 

 value; but of this an opinion can be better formed when the 

 result of his investigations has been published. 



Dr I. B. Balfour made some interesting remarks on the light 

 thrown on several genera of the Myxomycetes by his discovery 

 of a new species — Cribraria Balfoiiri, De By. — which unites 

 several genera. 



Mr Sadler read a paper on Agaricus Sadlcri ; and Dr B. 

 Carrington described and showed specimens of several new Scot- 

 tish HepaticcE. 



Dr Buchanan White read a paper on the Altitudes above Sea- 

 level attained by Fungi in Scotland, and gave a brief description 

 of a supposed new fungus he had found upon the leaves of Ery- 

 throxylon coca — the cuca-leaves of commerce. This he proposed 

 to call Trichobasis Balfouriana^ in honour of the President of the 

 Society. It may be described thus: " Sori hypophyllous, small, 

 subrotund, rather scattered, but often two or three together, epi- 

 dermis ruptured ; spores often obscurely pedunculate, pyriform, 

 pale brown, epispore finely tuberculate." Specimens and a 

 sketch of the spores were exhibited. 



Dr Parsons (of Goole) called attention to a scheme for inves- 

 tigating the geographical distribution of mosses in the British 

 Isles. Botanists desirous of helping may comnmnicate with 

 Dr Parsons (Goole, Yorkshire) or Mr C. P. Hobkirk (Hudders- 

 field). 



Mr C. B. Plowright (of King's Lynn) presented a copy of his 

 'Sphseriacei Britannici ' (three centuries) to the Society, and re- 

 ceived a hearty vote of thanks for his valuable donation. 



In the evening the annual dinner of the Society took place, 

 and on the following day an excursion was made to Penicuik 

 woods, under the guidance of Mr France, forester to Sir George 

 Clerk, who kindly threw his grounds open to the Society. A 



