1909-1910-] A Igce and their Study. 241 



Class— HETEROKONTiE. 



Order— CONFERV ALES. 

 Family — Chlorotheciaceae. 



30. Ckaracio]psis turgida W. & G. S. West. (Elf Loch, Braids.) 



Family — Tribonemaceae. 



31. THhonenia homhycinum (Ag.) Derb. & Sol. (Ditch near Dalmeny.) 



Class— MYXOPHYCE^ (or CYANOPHYCE^). 

 Order— HORMOGONE^. 

 Family — Scytonemaeeae. 



32. Scytonema coactile Montague. (Bavelaw, Pentlands.) 



33. M m^ra6^7e (Dillw.) B. & F. (Pentlands.) 



34. Tolypothrix lanata "Wartm. (Bavelaw, Pentlands.) 



35. DesTnonema Wrangelii (Ag.) B. & F. (Swanston.) 



Family — TsTostocaceae. 



36. CyliTidrospermum licheniforme Kiitz. (On damp earth, Edinburgh.) 



Family — Oscillatoriaceae. 



37. Lynghya Martensiana Menegh. (In warm water of about 40° C^ New- 



battle Colliery.) 



38. Oscillatoria chalybea Mertens. (Musselburgh.) 



Family — E-ivulariaceae. 



39. Dichothrix gypsophila (Kiitz.) B. & F. (Pentlands.) 



Order— COCCOGONE.^. 

 Family — ChroococeacesB. 



40. Chroococcus vaHus A. Br. (Wet rocks near Dalmeny.) 



41. Porphyridium cruentum (Ag.) Nag. (At the base of walls and on 



damp earth, gardens in Edinburgh.) 



[The award offered by the Society for the best collection of 

 fresh-water Algae was won by Mr F. L. M'Keever, whose work 

 was most favourably reported on by Mr Terras and Professor 

 West of Birmingham. The latter makes special mention of 

 No. 35, Desmonema Wrangelii, which he describes as "one of 

 the rarest blue-green Algae in the European flora." The above 

 paper was illustrated by numerous lantern microscopic slides, 

 and the life-histories of many Algae were shown and explained.] 



At this meeting Mr W. C. Crawford, M.A., read his report 

 of the Microscopical Section. 



