Nov. 1904.] | BOTANICAL SOCIETY OF EDINBURGH. 35 
342. N. appendiculata (Ag.), Kiitz. S.—-Lerwick. 
343. N. mesolepta, Ehrenb. O.—Kirkwall ; Hoy. S.—Near Lerwick ; 
Scalloway. 
Var. Termes (Ehrenb ), V. H. S.—Near Scalloway. 
344. N. Legumen, Ehrenb. S.—Bressay. 
345. N. oblonga, Kiitz. O—Finstown. 
346. N. peregrina (Ehrenb.), Kiitz. O—\Finstown. 
347. N. gracilis, Kiitz. O.—Moor pool near Stromness. S.—Near 
Lerwick. 
348. N. viridula, Kiitz. S.—Lerwick ; Scalloway. 
Forma minor, V. H. S.—Neugles Water. 
349, N. radiosa, Kiitz. O.—Near Kirkwall; Finstown ; Stromness ; 
Hoy. Plankton of Loch Kirbister. S.—Near Scalloway ; 
Bressay. 
350. N. aipocoohall, Kiitz. O.—Near Kirkwall. S.—Scalloway. 
351. N. rhynchocephala, Kitz, O—Near Kirkwall. S.—Scalloway ; 
Bressay. 
Var. rostellata, (Kutz. ?), V.H. O.—Hoy. 
352. N. Gastrwm (Ehrenb,.), Donk. 0.—Kirkwall. §$.—Lerwick. 
353. N. tumida, W.Sm. O.—Near Finstown. 
354. N. Semen, Ehrenb. O.—Hoy. 
355. N. dicephala, Ehrenb. O.—Hoy. S.—Near Lerwick. 
356. N. elliptica, Kiitz. O.—Near Kirkwall; Finstown ; Stromness ; 
Hoy. Plankton of Loch Kirbister. S.—Scalloway ; Lerwick ; 
Neugles Water. Plankton of Loch Asta (very abundant). 
357. N. pusilla, W.Sm. S.—Plankton of Loch Beosetter, Bressay. 
358. N. cuspidata, Kitz. O.—Pond near Kirkwall. S.—Bressay. 
359. N. exiles (Ktitz), Grun. O.—Hoy. S.—Near Lerwick ; Bressay. 
360. N. Amphisbena, Bory. 0.—Finstown. 
361. N. limosa, Kiitz. O.—Kirkwall ; Finstown ; Hoy. 
362. N. Iridis, Ehrenb., var. Amphirhynchus (Ehrenb.), De Toni. O.— 
W. of Kirkwall. 
Var. affinis (Ehrenb.) V. H. O.—Finstown; Stromness. 
Plankton of Loch Kirbister. 
363. N. contenta, Grun., var. biceps, V. H. O.—Hoy, on wet rocks. 
This species is often found on the leaves and bark of trees in 
damp climates. 
Genus STAURONEIS, Ehrenb. 
364. St. Phenicenteron, Ehrenb. O.—Finstown. S.—Near Scalloway. 
Plankton of Loch Asta. 
365. St. anceps, Ehrenb. 0O.—Kirkwall. S.—Near Lerwick; near 
Scalloway ; Bressay. 
Genus VANHEURCKIA, Bréb. 
366. V. rhomboides (Ehrenb.), Bréb. S.—Near Scalloway ; Lerwick. 
Var. Saawonica (Rabenh.), G. S. West. [Frustulia saxonica, 
Rabenh. ; Navicula crassinervia, Bréb.] OU.—Near Kirkwall ; 
Hoy. S.—Near Lerwick; near Scalloway ; Neugles Water. 
Plankton of Lochs Clickhimin and Trebister. 
Genus AMPHIPLEURA, Kiitz. 
367. A. pellucida, Kiitz. O.—Kirkwall; Finstown. %.— Bressay. 
Plankton of Loch Trebister. 
