1910-1911.] The A Iga- Floi^a of Mid- Lothian. 367 



Paroliniana (Menegh.) Nag., but that it must be placed 

 among the Phseophycese as Phceococcus Paroliniana (Nag.) 

 G. S. West. See Na 10. 



107. Asterococcus (superbus (Cienk.) Scherffel (= €rloeocystis infusionum 



(Schrank) W. & G. S. West and Chlorococcum infusionum 

 (Schrank) Menegh.) 

 Bog-pool, Bavelaw Moor. April. 



108. Dactylothece Braunii Lagerh. 



Bavelaw Moor. August. 



Class— HETEEOKONT^. 



Order— CONFERV ALES. 

 Family — Chlorotlieciaceae. 



109. Characiopsis turgida W. & G. S. West. 



This is a very rare Alga in Great Britain. I found it in great 

 numbers in the Elf Loch in the summer of 1909. As Prof. 

 West informed me that a study of its life-history would be 

 of considerable importance, I carefully searched for it in 

 the Elf Loch in 1910 and 1911, but could not find any 

 specimens. 



110. Mischococcus confervicola Nag. 



Only observed once, in Elf Loch in May 1911. 



Family — Tribonemaceae. 



111. Chlorohotrys regularis (West) Bohlin. 



Sphagnum bogs of Bavelaw Moor. April to August. Common. 



112. Ophiocytium majus Nag. 



Bavelaw Moor. Cells up to 12 ^u diam. August. 



113. 0. parvulum (Perty) A. Br. 



Bavelaw Moor. April, May, August. Common. 



114. 0. cochleare (Eichw.) A. Br. 



Bavelaw Moor. April, May ; Elf Loch, July. 



115. 0. Arbuscula (A. Br.) Eabenh. (= Sciadium Arhuscula A. Br.) 



Elf Loch, May ; Balerno, in pond, June. 



116. Trihonema bomhycinum (Ag.) Derb. & Sol. (= Conferva bombycina 



. ^^^-^^ 

 This Alga I have found only a few times in ditches near Mussel- 

 burgh, Marlpit at Davidson's Mains, and Dalmeny. 



117. T. bombycinum forma minor (Wille) G. S. West. 



Also fairly rare in the county. 



118. T. aflne (Kiitz.) G. S. West. 



Bavelaw Moor, May ; Harelaw Eeservoir in ditch, August. 



119. Bumilleria pumila W. & G. S. West. 



Loganlee, Pentlands. 



