. Quarterly journal of microscopical science . a, n. sp. (= N, humerosa, Breb.) 6.—, n. sp. 7.—N, pulchra, n. sp. 8.—N. angulosa, n. sj). 8*.- „ $. 9.—N. Macula, n, —N. Solaris, n. sp. 2 —.Y. f Pandura, Breb. (.?).12.—iV^.« nitida, Sm,12*.- „ ? 13.—N. incurvata, n. —N. splendida, n. —N. didyma, y. Costate — „ , S. A new variety,17.—N. clavata, n. —Pinnularia longa, n, —, n. —P. inflexa, n. —P. acutitiscula, n. —P. Ergadensis, n. sj).23.— Stauroneis amphioxys, n. sp. The figures in this plate represent, for th
. Quarterly journal of microscopical science . a, n. sp. (= N, humerosa, Breb.) 6.—, n. sp. 7.—N, pulchra, n. sp. 8.—N. angulosa, n. sj). 8*.- „ $. 9.—N. Macula, n, —N. Solaris, n. sp. 2 —.Y. f Pandura, Breb. (.?).12.—iV^.« nitida, Sm,12*.- „ ? 13.—N. incurvata, n. —N. splendida, n. —N. didyma, y. Costate — „ , S. A new variety,17.—N. clavata, n. —Pinnularia longa, n, —, n. —P. inflexa, n. —P. acutitiscula, n. —P. Ergadensis, n. sj).23.— Stauroneis amphioxys, n. sp. The figures in this plate represent, for the most part, full-sized or largeindividuals under a power of 400 diameters. No. 9, Navicida Macida, isrepresented under a somewhat higher power ; but I believe there areindividuals of equal size under 400 diameters. The remainder of the new forms which I have described in the GlenshiraSand, and several of which arc very curious, will be figured in the nextNumber of the Journal. jA^/rJou/r% *:. ! JOURNAL OF MICROSCOPICAL SCIENCE. DESCRIPTION OF PLATE XIV., Illustrating Dr. DAlquens paper on the Structure of Oscillatoria. Fig. 1.—Portion of a filament of Oscillatoria contexta, showing the striated proper —A detached cmptj piece of this —Portion of filament treated with iodine. rt. Entire portion. h. Proper cell-membrane slightly affected bj^ the reagent. c. The plain unstriated cellulose sheath or tube. d. Single joint on end. 4.—Portion of filament treated by weak ,—Ditto by a strong solution of chloride of —Ditto by a weak ditto. 7.—Ideal section of a filament, showing the concentric arrangement of itsdifierent tissues,rt. Vertical section. b. Horizontal section. c. Solid axis. d. Layer of protoplasm coloured by chlorophyll. e. Proper cell-membrane. 8.—Portion of filament, displaying the manner in which the cell-contentsare sometimes observed
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