Nov. 
391. 
392. 
393. 
394. 
395. 
396. 
397. 
398. 
399. 
400. 
401. 
402. 
403. 
404. 
405. 
406. 
407. 
408. 
409. 
1904.] | BOTANICAL SOCIETY OF EDINBURGH. 37 
Genus EPITHEMIA, Bréb. 
E. turgida (Ehrenb.), Kiitz. O.—Near Kirkwall; Finstown. S.— 
Plankton of Loch Asta. 
E. Sorex, Kiitz. O.—Finstown. 
E, gibba, Kiitz. O.—Kirkwall; near Finstown. S.—Near Scallo- 
way ; Neugles Water. Plankton of Loch Asta. Bressay, in 
ditches, and also in the plankton of Loch Beosetter. 
Var. ventricosa (Kiitz), V. H. O.—Pond near Kirkwall ; 
Finstown. S.—Bressay. 
. Argus (Ehrenb.), Kiitz. O.—Near Kirkwall ; Finstown ; Hoy. 
Var. alpestris (W. Sm.), Rabenh. 0.—Near Finstown; 
Stromness. 
E, gibberula (Ehrenb.), Kiitz. O.—Finstown. S.—Lerwick ; near 
Scalloway. 
E. Zebra (Ehrenb.), Kiitz. 0.—Kirkwall; Hoy. S.—Near 
Lerwick ; near Scalloway. 
Family NIrzscHIACE&. 
Genus NITZSCHIA, Hass. 
N. constricta (Kiitz), Pritch, O.—W. of Kirkwall. 
N. Sigmoidea (Ehrenb.), W. Sm. 0O.—Pond near Kirkwall ; 
Finstown ; Hoy. S.—Near Scalloway ; Bressay. 
N. vermicularis (Kitz), Grun. S.—Scalloway. 
N. linearis (Ag.), W.Sm. S.—Near Lerwick. Plankton of Loch 
Brindister. 
N. subtilis, Grun. S.—Bressay. 
N. Palea (Kiitz.), W. Sm. 0.—Kirkwall; Stromness. Plankton 
of Loch Kirbister. S.—Lerwick; Scalloway. Plankton of 
Lochs Asta and Trebister. 
Genus HANTZSCHIA, Grun. 
H. Amphioxys (Ehrenb.), Grun. S.—Scalloway. 
Family SURIRELLACE&. 
Genus CYMATOPLEURA, W. Sm. 
C. Solea (Bréb.), W. Sm. O.—Stromness ; Hoy. 
C. elliptica (Bréb.), W. Sm. 0O.—Plankton of Loch Kirbister. 
S.—Neugles Water. Plankton of Loch Asta. 
Genus SURIRELLA, Turpin. 
S. biservata, Bréb. O.—Kirkwall; Hoy. S,.—Near Lerwick ; 
near Scalloway ; Neugles Water ; Bressay. 
. linearis, W. Sm. O.—W. of Kirkwall; Hoy. Plankton of 
Loch Kirbister. S.—Neugles Water. Bressay, in ditches, and 
also in the plankton of Loch Beosetter. 
S. robusta, Ehrenb. S.—Plankton of Loch Clickhimin. 
Var. splendida (Ehrenb.), V. H. S.—Plankton of Neugles 
Water, Lochs Asta and Brindister, and also of Loch Beosetter, 
Bressay. 
S. ovalis, Bréb., var. ovata (Kiitz.), V. H. S.—Near Lerwick. 
Var. minuta (Bréb.), V. H. O.—Hoy. 
HR 
