. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 176. Fig. 73. Ptihiilicti/n plumen. Nat ural size, anil ]Mirtii>ii of surface en larged (after Hall and Sinipsouj. (Fig;. 7-;.) (Pal. X. Y., Genus PTILODICTYA. L( [Ety. : Ptilon, feather; dicti/on, net.] (1839: !Miirchis(m"s Silurian System, p. (JTB.) "Zoariiim" (Brvozoimi) '"pointed below, artienlating- into a 8|»i-ea(ling' base; above, a leaf-like ex])ansion, Avliich is sometimes lolled at the distal extremity, eelluliferous on both faces, divided by a mesial lamina. Marg-iii wit
. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 176. Fig. 73. Ptihiilicti/n plumen. Nat ural size, anil ]Mirtii>ii of surface en larged (after Hall and Sinipsouj. (Fig;. 7-;.) (Pal. X. Y., Genus PTILODICTYA. L( [Ety. : Ptilon, feather; dicti/on, net.] (1839: !Miirchis(m"s Silurian System, p. (JTB.) "Zoariiim" (Brvozoimi) '"pointed below, artienlating- into a 8|»i-ea(ling' base; above, a leaf-like ex])ansion, Avliich is sometimes lolled at the distal extremity, eelluliferous on both faces, divided by a mesial lamina. Marg-iii withont cells. Apertures circular (jr sulxpiadrate. No in- tercellular tissue, although some s])ecies show minute interaper- tural pits or tubuli on the sur- face of the ; (Hall, Pal. N. Y., Vol. VI., pp. xix., XX.) Ptilodictya plumea. Hall. Vol. Yl., p. 271, PI. LXI.) Distinguishing Characters.âFlattened wedge-sliaped form ; circular or broadly oval apertures; obsolete peristomes; ele- vated, granulose, interapertural space; low convex monti- cules, with somewhat largei- ajtei-tures; striated cylindrical basal ])()rtion. Found at " Hambui-g-on-the-Lake. Ei-ie County. X. ; (Hall): and in the Demissa V)ed, at Section ."), iu Eig'hteen Mile Creek (i-are). Genus GLAUCOX()^^0. (Joldfuss. [Ety.: Mythological name.] (1826: Petrefacta Geimaniiv, Vol. I., p. 100.) 'â Zoarium consisting of a main stem orrachis, from which proceed simple lateral branches at regular intervals, and occasionally branches hav- ing'the same mannei' of growth as the pi-imai'v Fig. 74. oiati- racliis; celluliferous on one side. Cell a])ertiu'es conome carina- ⢠, ... j. i i i "j. !⢠i ta. Enurged,x6 lu two I'auges, otten sej)arated by a longitudmal (after Hall and . ., , tt n r> t \t \- a- i \i ⢠, Simpson). cariua. (HaJI, Pfu. X. NoJ. \ \). xxiv.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for
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