84 
PALEONTOLOGY OF NEW YORK. 
Observations. Lichas (Arges) coniusus, in all known features bears a close simi¬ 
larity to L. granulosus, F. Roemer (Verstein d. Harzgebirges, Beitr. iii, pi. xx, 
fig. 9), and L. Haueri, Barrande (Syst. Sib, pi. xxviii, figs. 38-44), the former 
from the Stringocephalen Kalk (middle-lower Devonian) and the latter from 
Etage F of the Bohemian basin. These species are all representatives of the 
sub-genus Arges, Goldfuss, which is characterized by the elongate, sub-rectangu¬ 
lar and evenly arched frontal or mesial lobe; relatively short, coalesced first 
and second lateral lobes; obsolete third lobes and convex fixed cheeks. The 
type of Arges (A. armatus, Goldfs.) bears a pair of strong spines upon the glabella, 
but this appears to be a variable feature in this group. 
Distribution. Upper Helderberg group. Corniferous limestone; Near Clarks¬ 
ville, Albany county; Cherry Valley, Otsego county. In the boulders of decom¬ 
posed chert, Canandaigua, Ontario county. 
CERATOLICHAS, n. s.-g. 
Lichas (Ceratoliciias) gryps, n. sp. 
PLATE AIX B, FIGS. 7-13. 
Aoidaapis, n. sp. ? Hai.l. Illustrations of Devonian Fossils, pi. xix, fig. 1 (not figs. 2 and 3). 1876. 
Intra-sutural portion of the cephalon only known. Outline sub-semicircular, 
slightly trilobate on the anterior margin. Surface convex, elevated, trilo¬ 
bate. Margin narrow, slightly thickened. 
Glabella large, embracing nearly the entire cephalon. Frontal lobe ellip¬ 
soidal, convex or tumid, elevated behind, sloping abruptly to the sides and 
posterior margin, and becoming obsolete at or just behind the center of the 
shield. It bears at its summit two strong, diverging, recurved spines which 
nearly equal the glabella in length. Longitudinal furrows sub-parallel, 
diverging near the frontal margin. Lateral lobes depressed, becoming obso¬ 
lete ; the members of the first and second pairs have coalesced, and the third 
pair can be detected only as low, obsolescent nodes bearing a faint tubercle. 
Near the outer edge of the lateral lobes, and just within the eye-lobes, are 
slender, erect spines, usually represented only by their broken bases. The 
