Noy. 1904.] | BOTANICAL SOCIETY OF EDINBURGH. 11 
here described for the first time, and critical notes are 
appended to other interesting species. The contractions 
“0.” and “S.” are used respectively for Orkneys and Shetlands. 
Clas RHODOPHYCE &. 
Order NEMALIONACE. 
Family HELMINTHOCLADIES. 
Genus BATRACHOSPERMUM, Roth. 
1. B. moniliforme, Roth. O,—Near Stromness. 
Clas PH HOPHYCE. 
Order SYNGENETICA. 
Family DINOBRYACE2. 
Genus DINOBRYON, Ehrenb. 
2. D. Sertularia, Ehrenb. O.—Near Kirkwall. 
_3. D. eylindricwm, Imhof. O—W. of Kirkwall. 
Var. divergens, Lemm. O.—Hoy ; Finstown. §,—Scalloway ; 
Lerwick ; Plankton, of Loch Beosetter, Bressay. 
4, D. protuberans, Lemm. (0.—Near Kirkwall. S.—Lerwick. 
5. D. elongatum, Inhof, var. wundulatum, Lemm. S.—Near the outlet 
of Loch Beosetter, Bressay. 
Clas CHLOROPHYCE &. 
Order EDOGONIALES. 
Family Gip0GONIACE2. 
Genus c&pogontum, Link. 
‘6. CE. punctato-striatum, De Bary. S.—Lerwick ; Bressay. 
7. . platygynum, Wittr. O.—W. of Kirkwall. 
Numerous sterile species of this genus were observed from both 
the Orkneys and Shetlands. 
Genus BULBOCHATE, Ag. 
8. B. varians, Wittr. S.—Loch Beosetter, Bressay. 
Order CH ZTOPHORALES 
Family CoLEOCH BTACE. 
Genus CoLEocHzTE, Bréb. 
9. CO. scutata, Bréb. O.—Near Kirkwall. S.—Bressay. 
10. C. irregularis, Pringsh. O.—Near Kirkwall. 
seadie Family ULOoTRICHACE. 
Genus ULOTHRIX, Kiitz. 
11. U. zonata 1a (Web. and Mohr), Kutz. O.—Near Kirkwall ; Hoy. 
12. U. moniliformis, Kutz. option of Loch Asta. : 
