78 PALEONTOLOGY OF NEW YORK. 



LlCHAS (CONOLICHAS) ErIOPIS. 



PLATE XIX a. FIGS. 2-13, 15,16. 



: <m armatiis, Hall. Descr, New Species of Fossils, etc.. p. 81. 1861. 



/. . Hall. Fifteenth Rept. N. V. State Cab. Nat. Hist., p. 109. 1S62. 



/ i! Sixteenth Rept. N. Y. State Cab. Nat. Hist., p. 226. 1863. 



ttaspis) Eriopis, Hall. Illustrations of Devonian Fossils t pi. xix, figs. 4-7, 10, 11. 1876. 

 .1 sp. ?, Hall. Illustrations of Devonian Fossils, pi. xix, fig. 12. 1876. 



Cephalon one-half as long as wide; intra-sutural portion snb-quadrate. 



Glabella as broad as long; frontal lobe elongate-pyriform, anterior half 

 convex, tumid and sloping abruptly to the frontal margin, slightly constricted 

 at one-half its length and abruptly depressed upon the posterior half to the 

 occipital furrow. The first and second pairs of lateral lobes are coalesced by 

 the obsolescence of the second pair of lateral furrows, forming a single pair 

 of strong, elevated, elongate lobes, reaching from the margin to the occipital 

 furrow, and most convex posteriorly. Third glabellar lobes obsolete. The 

 longitudinal furrow formed by the union of the first and third pair of trans- 

 verse furrows is broad and deep, the marginal and palpebral furrows less 

 conspicuous. Occipital furrow relatively narrow ; occipital ring broad, and 

 showing evidence of having borne two strong central spines. 



Facial sutures normal. 



Cheeks abruptly deflected beneath the orbital lobe to the occipital ring; the 

 free portions slender, narrowing rapidly to the genal angles and thence pro- 

 duced into long incurving spines. 



Eyes prominent, crescentic ; palpebrum relatively large; palpebral lobe 

 inconspicuous. 



Thorax not observed. 



Pygidia found in association with the head above described, and bearing the 

 following characters, are referred to this species : Outline nearly semicircular. 

 A.xis bavin- a width, on the anterior margin, equal to one-third the width of 

 the shield ; convex, sbort, becoming rapidly obsolete beyond its most elevated 

 point. It bears in addition to the well-marked articulating ring, one low 

 annulation and traces of a second. Behind this is a strong, erect spine, 



