File:Geological magazine (1883) (14762857594).jpg

Identifier: geologicalmagazi210wood (find matches)
Title: Geological magazine
Year: 1883 (1880s)
Authors: Woodward, Henry, 1832-1921, ed
Subjects:
Publisher: London (etc.) Cambridge University Press
Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

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Text Appearing Before Image:
; glabella small, tumid, very obtusely conical, only half thelength of the head-shield, and one-third its breadth, no short lateralfurrows visible, only the two small basal lobes which truncate theposterior angles of the glabella; axal-furrows inclosing the glabellaantero-laterally ; neck-lobe narrow, rounded distinctly, separated bythe neck-furrow from the glabella; eyes small, placed close to theglabella, prominent, reniform, surface smooth ; no facial suturevisible ; free-cheeks convex, confluent around the glabella, with abroad flattened slightly concave margin, the rim of which is slightlyraised; posterior margin of free-cheeks separated by a furrow con-tinuous with the neck-furrow; the posterior angles of the headproduced into short slightly recurved spines; entire surface of headcovered with small bead-like tubercles, five larger ones being placedaround the front border of the glabella, and one in advance of eacheye on the free-cheeks. GeoLMaq.15 53. Decade IE Voi:XPl^IIl, x %k
Text Appearing After Image:
G.H>Vood.waLri. del. Fiq. 1 6. CarLoTiijWous TrUoLites. BrackuiTLetopus, etc. Carboniferous Limestone Trilobites. 535 Thorax not known. Pygidium circular, one-fourth wider than long, consisting ofseventeen coalesced somites, the axis forming one-third the entirebreadth of the shield where it joins the thorax, but diminishingrapidly to a rather blunt extremity at about one-fifth of its length,from the margin of the tail-shield, which encircles it ; eachring of the axis ornamented by a row of small granular tubercles(somewhat irregular in size); about eight grooved pleurae are seenon each side the axis, each pleura forming a raised rib, extendingto and becoming wider at its rounded extremity near the border,marked by a row of small tubercles, and having a shorter inter-mediate rib similarly ornamented, placed behind it, in the furrow;the pleurge, as well as the axis of the pygidium, are convex; themargin has a slight narrow rim around it. Formation.—Carboniferous Limestone. Localit

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