366 The Alga-Flora of Mid- Lothian, [Sess. 



Sub-Family — Tetraedrie.se. 



96. Tetraedron caudatum (Corda) Hansg. 



Elf Loch. August. 



Sub-Family — DicTYosPHiERiEiE. 



97. Dictyosphcerium Ehrenhergianam Nag. 



Bavelaw Moor. August. 



98. D. pulchellum Wood. 



Craiglockhart Pond, December ; Bavelaw Moor, May, July, 

 August ; Elf Loch, July and August. 



The specific distinction of these two species is doubtful : in that 

 collected from Bavelaw Moor in August I found the two species 

 frequently together. D. Ehrenhergianum, cells 4-6 m crassa x 

 7-9 M longa. D. 'pulchellum, cells spherical, 7-8 jx diam. 



99. Botryococcus Braunii Kiitz. ( = Ineffigiata neglecta W. & G. S. West). 



Craiglockhart Pond, in large quantities in the plankton. 



100. B. sudeticus Lemm. 



Elf Loch ; Duddingston Loch ; Bavelaw Moor. April-July. 



Family — PalmellaeeaB. 



Sub-Family — Palmelle^. 



101. Palmodactylon varium Nag. 



Found in the forms simplex and suhramosum among sphagnum in 

 Bavelaw Moor. April, May. 



102. Sphcerocystis Schroeteri Chod. 



Craiglockhart Pond and Duddingston Loch plankton. July. 



Sub-Family — Tetraspore^. 



103. Tetraspora lubrica (Roth) Ag. 



Marlpit at Davidson's Mains ; ditch near Harelaw Reservoir. 

 July, August. 



104. T. gelatinosa (Vauch.) Desv. 



Elf Loch. August. Also in smaller ponds and ditches. Common. 



Sub-Family — GLCEocYSTiDEiE. 



105. Glceocystis vesiculosa Nag. 



On damp wood in garden, Edinburgh. July, August. 



106. Gl. gigas (Kiitz.) Lagerh. 



Among sphagnum in bog-pool, Bavelaw Moor. April, May. 

 106a. Gl. Paroliniana (Menegh.) Nag. { = Phoeococcus Paroliniana (Nag.) 



G. S. West). 

 Prof. G. S. West, to whom I sent this Alga at various times, 



informs me that he considers it to be identical with Gl. 



