Contributions to Palazontoloqy. 



139 



curving forward at the sides : occipital ring curving 

 forward, wider in the middle. Dorsal furrow strongly 

 marked at the sides, deeply indented at the anterior 

 angles of the glabella, and continued in front of the 

 same depth as at the sides. 



Facial suture vertical in front of the eye, meeting the 

 anterior angle of the palpebral lobe opposite the ante- 

 rior glabellar furrow. The palpebral lobe extends as 

 low as the posterior glabellar furrow, whence the suture 

 turns outwards and obliquely downwards. 



Fixed cheeks of moderate width, and, in larger speci- 

 mens, distinctly marked by ocular ridges which extend 

 from the anterior glabellar furrow to the anterior mar- 

 gin of the palpebral lobe : the posterior limb is com- 

 paratively broad, triangular. Frontal limb of medium 

 width, rising somewhat abruptly from the furrow in 

 front of the glabella, and forming a rounded, more or 

 less prominent ridge, descending into a subcentral 



i groove, from which the anterior border rises abruptly, 

 forming a narrow ridge which is a little wider in the 

 middle than at the sides. 



This is a well-marked species, preserving its distinguishing fea- 

 tures even in the smallest specimens. It is remarkable for the 

 great width of the glabella at its base, the strong glabellar furrows, 

 and truncate apex; while the prominent ridge in front of the gla- 

 bella, with the anterior furrow and sharply elevated margin, are 

 peculiar. The ocular ridges, conspicuous in the larger specimens, 

 are observable in the smaller ones. 



A small specimen gives the following measurements : Length of 

 glabella, .18 inch; width at base, between .19 & .20; width at 

 apex, .11 ; frontal limb, .09. Entire length, .32 inch. 



Several larger specimens are imperfect; one of them being nearly 

 twice as large as the one measured. 



This species occurs, in numerous small specimens, in the ferru- 

 ginous gray sandstone at Kickapoo, Wisconsin, associated with 

 Conocephalites nasutus and C. diadematus. In one specimen from 

 a different bed, there is a single individual of twice the ordinary 



