ae et 
NOTES ON SCOTCH FRESH-WATER ALG. i0i 
A. sp. Ben Laoigh. Crass. cell. 5°5-7 4; crass. heterocyst. 
Op 
~ tere 
Hike Ann. des Scien. Natur. Te sér. tom. 8, p. 874). —. 
: ig. ll. 5., 4., 
McDhui. On dripping alpine ro fick®! This species seems to be wall 
marked by the total absence of heterocys 
Gleotrichia Pisum (Ag.) Thuret. Orknéy Is. Crass. fil. 9-10 p; 
crass. trich. 6 p. 
Ord. ScyronEMACEZ, 
. . distorta Kiitz. Ben Chiurn. Crass. fil. 11°5-13 p; 
crass. trich. 5-7°5 p; crass. heterocyst. 6:5 p 
*Seytonema tolypotrichoides Kiitz. B. Crisk fil. 15-16°5 p 
erass. trich. 10-11 p; crass. heterocyst. 10 p. Fig. 15. _The ot 
were mostly subquadrate, but some of the younger specimens had 
the cells up to four times as long as broad, the heterocyst being 
. variable, and the younger sheaths constantly hya 
5. fo Ag. Ben MeDhui. Crass. fil. 90-93. ys ee 
trich. 5-7°5 pw; b onakoaynt 15-18 x 10 p. This occurred m 
with Stigonema turfaceum Cooke 
Ord. eat ae 
Stigonema panniforme (Ag.) B ot Flah. Glen Tummel. 
S. turfaceum Cooke. Ben MeDhui, Orkney Is. 
Ord. OscrLARIACE2. 
Oscillaria Frélichii Kitz. B., Ben Laoigh. 
O. nigra Vauch. B., C., Ben ’ Chiurn. 
O. tenuis Ag., var. curses Kitz. B. 
0. apcion aay Kitz. Ag 
O. tenerrima Kitz. 
L aie iaieddte (Kits. _ C. 
Siib-class Chroococcacee. 
Ord. CHroococcacEz. 
Chroococcus minor (Kiitz.) Nag. 
C. pallidus (Nag.). Ben Chiurn 
C. turgidus (Kutz ee Very ‘fre reque 
C. coherens Nag. Corrie Gudidor. aibkaaean: 
— Glaocapsa polyder wai Kitz. B. 
Synechococcus eruginosus Nag. 
Merismopedia glauca (Ehrnb.) Nig. ies eae Tummel. 
M. irregulare Lagerh. 5. Diam. cell. 2-2: 
Aphanocapsa rivularis (Carm.) Rabh. B. Gn 
A. Grevillei (Berk.) Rabh. Forma cum cellulis vi nag 
a. in forma seine. Lat. famil. 88-42 »; lat. cell. 3». Ben 
Misco protogenita (Bias.) Rabh. O., Glen Tummel. 
Aphanothece microscopica Nag. Aberdeen. 
