NATURAL HISTORY SOCIETY OF GLASGOW. IxXXVU 



causes which have led to the partial or total extinction of certain 

 native plants in various parts of the country. He moved, and 

 it was unanimously resolved, that the Society should endeavour 

 to aid the Committee by submitting a Report for the West of 

 Scotland, and that Professor Thomas King should receive 

 mateiials for its preparation. 



Mr. David Robertson, F.L.S., F.G.S,, exhibited an unusually 

 large specimen of Zeugoptei-us punctahis, Bl., from Cumbrae.* 



Mr. A. Somerville, B.Sc, F.L.S., exhibited specimens of Sedges 

 gathered by him last July and August in the Upper Strathspey 

 district. These included Carex rigida, Good., from Scor-an, one 

 of the Cairngorm range of mountains ; C. aquatilis, Wahl., 

 from between Kingussie and Aviemore ; C. filiformis, L., from 

 Loch Alvie ; and numerous other species. 



Professor Thomas King showed a collection of Ferns from 

 New Zealand. 



Mr. Christopher Sherry exhibited living specimens, from the 

 Glasgow Botanic Gardens, of Botrychium ternatum, Sw., and 



B. virginicum, Sw., both natives of the United States. 



Mr. Sonntag showed a fine series of Desmids collected between 

 Gourock and Wemyss Bay, on Helensburgh moor, and in various 

 other parts of the Clydesdale district. Among the rarer species 

 exhibited were Micrasterias rotata, Grev., M. denticulata, 

 Breb., M, truncata, Corda, M. papilUfera, Breb., 31. vrux- 

 inelite^isis, Ehr., M. americana, Ehr. (M. morsa, Ralfs), M. 

 Jenneri, Ralfs, Euastruvi verrucosum, Ehr., E. oblongum, 

 Grev., E. affine, Ralfs, E. insigne, Hass., E. elegans, Breb., 

 E. binale, Ralfs, E, cii-yieatuni, Jen., CosDiariuni ovale, Ralfs, 



C. Ralfsii, Breb., C ornatum, Ralfs, Xanthidium armatum, 

 Breb., X. C7'istatum, Breb., Staurastrum tumidum, Breb., 

 S. fiiTcatuni, Ehr., var. armigerum (S. spinosum, Ralfs), 

 S. brachiatum, Ralfs, S. secccostatuni, Breb., Tehnemorus Ice vis, 

 Ralfs, Penium inter rvptuin, Breb., Docidium clamttim, Kutz., 

 Closterhcm turgidum, Ehr., C. attenuatum, Ehr., C rostratum, 

 Ehr., and C. Ralfsii, Breb. 



Mr. Richard M'Kay exhibited some microscopic sections 

 illustrating the structure of roots of Tilia, stems of Pieris 

 aquilina, etc. 



Mr. John Smith, Corresponding Member, submitted a paper 

 on the distribution of Equisetum maanmum. Lam., and E. 

 hyemale, L., throughout Ayrshire.t 



Mr. D. A. Boyd read a paper on Hymenoscypha (Sclerofinia) 



Curreyana (Berk.) Phil., a fungus which grows from a 



sclerotium formed in dead stems of J uncus comtuunis ; and he 



stated that while the sclerotium (which was formerly described 



♦ Transactions, vol. iii., p. 2G7. t Ibid, p. 249. 



