. Annual report of the Regents. New York State Museum; Science. /^?^-^ NIAGARA FALLS AND VICINITY I75 monticules, and traversed by slender, rounded, bifurcating ridges, which appear as shallow grooves when the surface is worn; aper- tures nearly circular, occupying the summits of prominent papillae; mesopores present, but closed at the surface; large median tubuli in the middle layer or mesotheca. Rhinopora tuberculosa Hall (Fig. yy) (1852. Pal. N. Y. 2:170, pi. 40E, fig. 4a-c) Distingiiishi)ig characters. Lamellose or explanate palmate fronds; asperate and tubercu- ^^^ lous surface; tubercles
. Annual report of the Regents. New York State Museum; Science. /^?^-^ NIAGARA FALLS AND VICINITY I75 monticules, and traversed by slender, rounded, bifurcating ridges, which appear as shallow grooves when the surface is worn; aper- tures nearly circular, occupying the summits of prominent papillae; mesopores present, but closed at the surface; large median tubuli in the middle layer or mesotheca. Rhinopora tuberculosa Hall (Fig. yy) (1852. Pal. N. Y. 2:170, pi. 40E, fig. 4a-c) Distingiiishi)ig characters. Lamellose or explanate palmate fronds; asperate and tubercu- ^^^ lous surface; tubercles mostly destitute of cells at the sum- mit; cells rising in pustules on - --k, tvl ' the surface and opening by '^^- - > roundish oval or tripetaloUS Fig. 77 Rhmopora tubercolosa with enlargement apertures. Found in the Rochester shale at Lockport (Hall) and probably also at Niagara. Genus diamesopora Hall [Ety.: did, through; //i^-oc, middle; -6f)i, pore] (1852. Pal. N. y. 2:158) Zoarium ramose, of hollow stems lined internally by an epitheca; zooecia simple, hexagonal, or rhomboidal, with an oval orifice in the anterior half, which, with I growth, forms a tubular vestibule; ' aperture with peristomes equally elevated or highest posteriorly; \ I intervestibular spaces compact or ^- ^Ji / horizontally laminated. ^ / , \ Diamesopora dichotoma Hall > (Fig. 78) (1852. Pal. N. Y. ;:; ' ' 2:158, pi. 40B, fig. 3a-d) Distinguishing characters. Cy- lindric, hollow, regularly bifurcat- ^- .^J i^g" stems (a thin crust inclosing inorganic matter); interior of hoi- Fig. 78 Diamesopora dichotoma with enlarge- ™®^* low branches transversely striate; cells opening upward in regular ascending or spiral hues; promi- nent nariform peristomes; stems usually flattened. Found in the Bryozoa beds of the Rochester shales at Niagara, usually in a crushed condition. Also at Lockport (Hah).. Please note that these images are extracted from scanned page images that may have been digitally e
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Keywords: ., bookauthorne, bookcentury1800, bookdecade1880, booksubjectscience
