238 PALEONTOLOGY. 



verging from the base upward to the rather squarely truncated summit; 

 height above the occipital furrow scarcely exceeding the breadth of the base, 

 and the width at the summit equal to about two-thirds of the height; marked 

 by three pairs of very oblique, subequally distant, and moderately distinct 

 transverse furrows. Occipital furrow naiTow and well marked; ring distinct, 

 widest and somewhat pointed on the center of the posterior margin. 



Fixed cheeks wide, separated from the glabella by distinct dorsal fur- 

 rows, prominent and rounded between the glabella and eye-lobe, almost 

 equaling the convexity of the glabella; ocular ridges slender and curved. 

 Frontal limb wide and concave, destitute of a thickened marginal rim, as 

 long as the glabella, and obscurely trilobed from an extension of the dorsal 

 furrows, forming a convex, boss-like area in front of the glabella, which is 

 divided transversely by a doable depressed line, or narrow fillet, midway of 

 the limb and parallel with the anterior margin of the head. Eye-lobes 

 about half as long as the glabella, obliquely situated, and separated from 

 the fixed cheek by a deeply-depressed ocular sinus. 



Facial suture cutting the anterior border on a line with the front angle 

 of the eye, which it reaches by a broad, convex curvature, giving rounded 

 lateral margins to the frontal limb; posterior to the eye, it is directed out- 

 ward; the actual course not determined. Posterior lateral limbs not seen. 

 Surface of the crust in front of the glabella strongly striated. 



The species is only known by the glabella and fixed cheeks. The 

 specimens are all minute, but readily recognized by the peculiar formed 

 boss in front of the glabella. 



Formation and locality. — In limestone of the age of the Quebec group, 

 at the base of Ute Peak, Wahsatch Range, Utah. Collected by Arnold 

 Hague, esq. 



Genus CREPICEPHALUS Owen ? - LOGANELLUS Devine. 



CEEPICEPHALIIS ? (LOGANELLUS) QUADRANS U. Sp. 

 Plate II, figs. 11-13. 



Form of entire body unknown. Glabella and fixed cheeks together 

 broadly quadrangular, about four-fifths as high as wide, and quite uniform 



