98 
PALEONTOLOGY OF NEW YORK. 
Glabella depressed-convex, slightly flattened above and posteriorly elevated 
on the axial line; long, conate, extending to the frontal border. Width at 
the base greater than one-third the width of the shield. Lateral furrows 
obscure, but indications of three pairs may be observed. Occipital lobes 
comparatively large; occipital furrow narrow, bifurcating near the axial fur¬ 
rows to include the occipital lobes, and becoming very deep upon the cheeks ; 
occipital ring broad and flat. 
Cheeks convex, depressed about the base of the eyes, thence somewhat 
abruptly deflected to the marginal sulcus and occipital furrow. 
Eyes comparatively small, approximate, attaining the elevation of the 
glabella. Palpebrum small; palpebral lobes depressed, obscure; palpebral 
sulcus shallow. 
Thorax sub-quadrate, length to width as 2 to 3 ; margins nearly parallel; sur¬ 
face equally trilobate. 
Axis evenly arched, widest at the fourth segment and tapering thence 
regularly backward. Segments flattened, transverse. 
Pleurce flat for one-half their width and thence deflected in a moderately 
sharp curve to the margin. Each segment is grooved for two-thirds its length, 
and beveled upon the outer third by the articulating plane. 
Pygidium parabolic in outline, length to width as 3 to 5; evenly convex; bor¬ 
der broad, flat or slightly sloping. 
Axis prominent and evenly tapering to an abrupt and somewhat elevated 
termination just within the posterior border, with which it is connected by a 
low ridge. Indications of seven or eight transverse annulations appear on 
the axis, exclusive of the articulating ring, which is more conspicuous than 
any of the others. 
Pleurae evenly sloping to the lateral and posterior margins. Articulating 
ring very conspicuous; annulations obscure, almost obsolete. Four are visible 
in favorably preserved specimens, and all are depressed above and fsiintly 
grooved. 
