98 NOTES ON SCOTCH FRESH-WATER ALG, 
Class Confervoidee Isogame. 
Ord. ConFERVACES. 
Conferva pachyderma ae N., Orkney Is. 
C. bombycina Ag., f. ee Wille. B., Ben Nevis, Ben MeDhui, 
Aberdeen.—f. minor Wille. 3 OU... OE, "Ben Nevis, Orkney Is. 
C. floccosa (Vauch.) Ag. oii Is. 
C. Raciborskit Gutw. (La Nuova Notarisia, 5 Aprilo, 1892, p. 17). 
B., N. Perhaps this spevice may be but a large form of C. Léfgrenit 
Nordst. (Aly. Easic. No. 421, p. 17), but the specimens examined 
are 2 Rear the plant described by Gutwinski. Lat, 24-25 »; crass. 
Fi 
pe 
Cladophora glomerata (L.) Kitz. §., Glen Lochaidh. 
Draparnaldia glomerata (Vauch. Ag. B. 
D. plumosa (Vauch.) Ag. Glen Lochaidh. 
Ord, UnorricHacE®. 
Hormiscia zonata (Web. et Mohr. ei Aresch, T. 
H. moniliformis (Kitz.) Rabh. 
Ulothrix tenerrima Kitz. M 
Class Conjugate. 
Ord. MrsocarPez, 
Mougeotia nummuloides (Hass.). B. Crass. cell. veget. 13°5- 
15 fi diam. spor. 28-87 p 
*M, gelatinosa Wittr. in Witte. et Nord. Alg. Easic. No. 957, p. 26. 
Crass. cell. veget. 15-16°5 »; long spor, 42-47 p ; lat. spor. 833-36 p. 
Glen Lochaidh. 
M. recwrva (Hass.), var Scortca, nov. var. Fig. 1. Var. paullo 
major, canalibus copulationis multe inflatis. he cell. veget. 
7°5-21 »; diam. spor. 25-28 p. en Tummel. The conjugating 
canal is distinctly visible all round the spore, as in M, Minnesotensis 
Wolle and M, divaricata Wolle. 
Ord. ZyaneMacEx. 
Spirogyra varians (Hass.) Kiitz. G. Crass. cell. veget. 30 p; 
long zygosp. 50-56 at ; lat. zygosp. 84-86 1 
Zygnema sp. (ster Killin. Cra all. veget. 20-24 w; long 
14--4-plo major. Several attempts at intake conjugation were seen, 
but no ri Zygos 
Z. sp. (ster.). C. ‘eae. cell. veget. 25-26 »; long 14-plo major. 
Z. sp. (ster.). C., B. Crass. cell. veget. 33-37 »; long 1-14- 
plo major. 
Class Cenobiea. 
Ord. PANDORINES. 
Pandorina morum Mill. C. 
Ord. PEprastRE&. 
Pediastrum angulosum (Ehrnb.) Menegh. 
P. Bo pty Turp.) cre Bi; S., Abaiatien. Bet granu- 
titael’ (Kiitz.) A. Braun. 
P. bidentulum A, Braun, Aberdeen. 
