1910-1911.] The A Iga- Flora of Mid- Lothian. 361 



39. M.floccosa (Vauch.) Thur. 



Fairly common in ponds and ditches. Balerno ; Colinton ; Marl- 

 pit at Davidson's Mains. April-August. 



40. M. stagnorum (Kiitz.) Lagerh. 



This species was found in various localities, both in running and 

 stagnant water. The cells were mostly cylindrical, but forms 

 slightly constricted at the dissepiments (described by T. E. 

 Hazen as Microspora tumidula spec, nov.) were also found 

 occasionally. April-June. 



41. M. ahhreviata (Rabenh.) Lagerh. 



Pentlands. June. 



Order— CLADOFHORAIiES. 

 Family — Cladoplioraeeae. 



42. Chcetomorpha sutoria (Berk.) Rabenh. 



Found only once, in a burn near Currie, in July. Most of the 

 species of this genus are marine. 



43. Rhizoclonium hieroglyphicum (Kiitz.) Stockm. { = Conferva fontinalis 



Berk, txndi Microspora fontinalis De Toni). 

 As everywhere else, very common in this district, in running as 

 well as stagnant waters, on wet rocks, &c. Most of the 

 specimens found were devoid of branches. 



44. Cladopkora glomerata (L.) Kiitz. 



Very common in all the burns and streams around Edinburgh. It 

 is very conspicuous, especially in late summer, in the Water 

 of Leith, from Balerno to Leith ; Braid Burn ; Esk, &c. 



45. CI. crispata (Roth) Kiitz. 



Very common in St Margaret's Loch ; Dunsapie ; Duddingston 

 Loch ; pond in Inverleith Park. 



Order— SIPHONED. 



FAMiLT—Vaucheriacese. 



46. Vaucheria sessilis (Vauch.) DC. 



Very common near all the burns of the Pentlands. It occurs in 

 thick felt-like masses, and is easily distinguished with the 

 naked eye from other Algae. July-September. 



47. V. geminata (Vauch.) DC. 



Nearly as common as the previous species around Edinburgh. 

 Bonally Reservoir on damp mud. September. 



48. V. terrestris Lyngb. 



Growing very like a moss on damp earth in gardens ; especially 

 common on earth in flower-pots, &c. At all seasons. 



49. V. hamata (Vauch.) Lyngb. 



On damp earth, Royal Botanic Garden, June. 



