BULLETIN OF THE LABORATORIES 
Il6 
GENUS DALMANITES, Emmrich. 
X. Dalmanites Werthneri, sp. n. 
^ General form of the body elongate-ovate, greatest breadth across the 
posterior part of the cephalic shield. 
Head convex, semi-circular, breadth about five-thirds as great as 
the length; border extended in front into a semi-circular process, 
which varies from forms in which it is scarcely evident, to those in 
which it equals about two-fifths of the breadth of the anterior border 
in its projection beyond the curve of the border itself, never as distinct 
as in D. vigilans ; base about one-fourth as broad as the greatest width 
of the glabella, or even less ; lateral borders broad, separated from the 
cheeks by a distinct groove, produced posteriorly into rather long and 
slender curving spines, which continue the curvature of the lateral 
borders of the glabella. 
Glabella large, depressed convex, widening in front to almost twice 
its width at the posterior margin, divided into lobes by three pairs of 
transverse furrows in addition to the occipital furrow, which is distinct 
and continuous. All three furrows distinct at the sides, not 
extending entirely across the glabella except in some specimens as 
a faint depression. Anterior furrows deeper, situated a little anteri- 
or to the eyes, giving to the frontal lobe a transversely elliptical out- 
line; occipital ring narrow, without a spine as far as known. Eyes 
very prominent, short reniform, containing obout thirty- five vertical 
ranges of lenses, the middle ranges having six to seven each ; palpe- 
bral lobe depressed, giving great prominence to the rim of the eyes. 
Cheeks small, anteriorly quite prominent, posteriorly marked by a 
deep, bordering groove, the continuation of the occipital furrow, mar- 
gin flat. 
Thorax with the axial lobe convex, widest at the sixth segment, its 
greatest width about two-thirds that of the lateral lobe, or a little lar- 
ger. The articulations curve forward a little near the middle and at 
their junction with the lateral lobes ; articulations of the lateral lobes 
traversed by a deep longitudinal furrow extending from the junction of 
the anterior margin with the axil lobe, backwards along the anterior 
margin of the articulation, at about one third the width of the articu- 
lation, leaving it towards the extremities. From the imperfect preser- 
vation, the exact method of leaving can not be determined. 
