. The British freshwater Rhizopoda and Heliozoa. Rhizopoda; Heliozoa; Freshwater animals. PLAOOOISTA SPINOSA. 45 Wales. â Snowdon (West), Llyn Crafnant and Dolgam, Capel Curig {Hoph. coll.), Carnarvonshire; Towyn, Merionethshire (Gash). Scotland.âShetlands ; â Hebrides ; Inverness-shire and Aberdeenshire (Brown); Perthshire (Gash, Broivn); Argyllshire (Broiun) ; Midlothian (Gash) ; Wigtown- shire (Brown). Ireland.âClare Island and mainland, Mayo; G-al- way; Wicklow (Archer, Hoph.); Kerry (Archer). In the British Isles this species is found at all alti- tudes at vfhich sphagnum flourishes and i
. The British freshwater Rhizopoda and Heliozoa. Rhizopoda; Heliozoa; Freshwater animals. PLAOOOISTA SPINOSA. 45 Wales. â Snowdon (West), Llyn Crafnant and Dolgam, Capel Curig {Hoph. coll.), Carnarvonshire; Towyn, Merionethshire (Gash). Scotland.âShetlands ; â Hebrides ; Inverness-shire and Aberdeenshire (Brown); Perthshire (Gash, Broivn); Argyllshire (Broiun) ; Midlothian (Gash) ; Wigtown- shire (Brown). Ireland.âClare Island and mainland, Mayo; G-al- way; Wicklow (Archer, Hoph.); Kerry (Archer). In the British Isles this species is found at all alti- tudes at vfhich sphagnum flourishes and is perhaps more numerous at the higher elevations (i. e. 800- 2000 ft.). Freshly gathered sphagnum is the best material in which to seek active individuals. The pseudopodia are seldom seen. The ZoochlorellsB occasionally found in the plasma have the appearance of being perfectly healthy and of living there Fia. 129.âVarious types of spines of Placocista spinosa. o-c, x 800; dr-f, X 1040 (after Penard) ; f, side view. The small, button-like processes (fig. 129 a-c) by which the spines are attached to the test are of a chitinous nature and are dissolved by strong sul- phuric acid whilst the silicious scales and spines remain unaffected. The spines are usually solitary but may arise in pairs or rarely in threes; they are, except very rarely, flattened, and vary in broad view from linear to lanceolate in shape; the broad view is always approximately in the plane of the broad view. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cash, James, 1839-1909; Hopkinson, John, 1844-1919. joint author; Wailes, George Herbert, 1862-. London, Printed for the Ray Scociety
Size: 1436px × 1740px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookauthorcashjames18391909, bookcentury1900, bookdecade1900
