I KII.xl.ITR8. 



n.ul . 



. |t.n,K->. Is77. 



CONOLICHAS OORNUTU8 H. *l>. 



The specimen to be described was entire when found, but before coming into 

 my li:ui'l-. sii tit-red from unskillful manipulation to such an extent as to obscure the 

 lohatiun of the glahella ami the segmentation of one side of the thorax. Notwith- 

 -tamling, the condition of its preservation is much better than can usually be hoped 

 for, in this group of fragile trilobites, for a Lichas with its parts in normal juxtaposi- 

 tion i< a rare occurrence. 



(Vphalon transverse; narrowed and attenuate toward the lateral extremities; 



. 72, 73. OmoifeAo* corn* tut. 



greatly elevated axially. Length 11 mm.; width 81 mm. Glabella prominent; 

 anterior margin the arc of an ellipse, projecting conspicuously beyond the general 

 outline of the shield. The surface is convex, rising in a deep curve from the anterior 

 margin to a well defined apex, marked by the base of a strong spine. This point is 

 84 mm. above the horizontal plane of the anterior margin. The lateral slopes of the 

 glabella are less curved, and the posterior slope is long, straight or slightly incurved. 

 The lateral and posterior lobes of the glabella are so obscured that only the delimi- 

 tation of the former can be made out It is evident that no middle glabellar furrow 

 f ed, but the anterior and posterior furrows were confluent and continuous. This 

 furrow, originating on the anterior margin, rises nearly vertically along the sides of 

 the glabella, making at first a slight inward curve, and, at about one-half the length 

 of the median lobe, curving outward, terminating near or in the occipital furrow. 

 The lateral lobes thus set off are large, though they were probably not greatly 

 elevated, and represent the first and second lateral Inlies of species in which the 

 median glabellar furrow is developed. Whether the third or occipital lobes existed 

 cannot be ascertained. Cheeks elongate and tapering; but slightly curved posteriorly 

 toward their extremities. Where they unite with the glabella they are so much 



