. Bulletin - New York State Museum. Science. 290 NEW YORK STATE MUSEUM that species H. b 1 a i n v i 11 i i differs in its much more rapidly iDranching zoarium and consequent shorter cells, producing a fuller and denser stock. Middle Devonic. Gaspe Basin, P. Q. CORALS Pleurodictyum lenticulare Hall var. laurentinum no v. Pleurodictyum lenticulare is a species of the Helder- "bergian (New Scotland) fauna characterized by its very large and few cells, the walls of which are strongly marked by nodose and T^roken septa. A central cell, hexagonal in form, is bounded by .six others and it often
. Bulletin - New York State Museum. Science. 290 NEW YORK STATE MUSEUM that species H. b 1 a i n v i 11 i i differs in its much more rapidly iDranching zoarium and consequent shorter cells, producing a fuller and denser stock. Middle Devonic. Gaspe Basin, P. Q. CORALS Pleurodictyum lenticulare Hall var. laurentinum no v. Pleurodictyum lenticulare is a species of the Helder- "bergian (New Scotland) fauna characterized by its very large and few cells, the walls of which are strongly marked by nodose and T^roken septa. A central cell, hexagonal in form, is bounded by .six others and it often happens that the development of this spe-. Pleurodictyum lenticulare var. laurentinum cies does not pass this primitive expression. The form before us lias the same form and size of cells which are marked by radial nodose and denticulated septa, these being most prominent -and most irregular at the base. The lenticular corallum however grows to larger size, showing three cycles of cells about that which may 1)6 taken as central. In the measurements of the cells the New York and the Gaspe forms are alike. Lower Devonic. Grande Greve and Perce rock, P. Q. GRAPTOLITES Chaunograptus gracilis nov. A shell of Leptostrophia magnifica Hall has afifixed to it an irregularly branching black conchiolinous repent fossil which in structure and substance seems to be congeneric with the peculiar organism described and figured by Hall as Dendrograptus (Chaunograptus) novellus from the Waldron (Niag- aran) fauna [Geol. Sur. Ind. nth Rep't. 1881. p. 225, pi. i, fig. i, 2; before in Alb. Inst. Trans. 1879, v. 10, abstract, p. 2]. A com-. 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 New York State Museum; New York State Museum. Albany : New York State Education Dept
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