6 SMITHSOXIAX MISCELLANEOUS COLLECTIONS VOL. IO3 



The glabella is slightly expanded and the anterior angles are rounded 

 off. Because it is exfoliated, the three pairs of furrows show clearly, 

 the wide posterior pair continuing across the glabella. On the test 

 this glabellar furrow is very shallow and possibly interrupted in the 

 middle. The brim is of moderate width and slightly upturned. Exclu- 

 sive of the wide dorsal furrow the palpebral lobes, which also are 

 the fixigenes, are nearly half the width of the glabella and maintain 

 most of their width to the occipital furrow. The eyes measured in a 

 straight line from end to end are almost as long as the glabella and, 

 of course, measured around their outer edge are longer than that. 

 The eyes extend from the occipital furrow to a point about one-sixth 

 the width of the glabella beyond the lateral dorsal furrow. This 

 leaves a narrow fixigene slightly exceeding the width of the eye band 

 at the forward end of the eye. The glabella is rather evenly convex 

 both laterally and longitudinally, with a moderate curvature. As can 

 l)e seen in the front view, the libragenes are rather sharply and evenly 

 curved, first rising considerably above the bottom of the dorsal furrow. 



Honey Creek limestone; (loc. 37t) 4 miles southeast of Hennepin, 

 Arbuckle Mountains, Oklahoma. 



Holotype.— U.S. 'NM. No. 10863 1. 



CHARIOCEPHALUS BELLUS, new species 



Plate i, Figures 4-6 



This species, represented by cranidia only, is associated with C. 

 bulla. 



C. hcllus is characterized by its quadrate glabella. Although the 

 front of the glabella and the anterior angles have the aspect of a 

 quadrate form, the illustration shows that both are definitely rounded. 

 In addition to the occipital furrow, there are the usual three pairs of 

 glabellar furrows, the posterior pair being connected across the middle 

 by a faint depression while the anterior pairs are very shallow 

 throughout. Brim convex and turned down slightly. The fixigenes 

 at their widest point are about one-third the width of the glabella. 

 The exceedingly long eyes extend forward well beyond the latera* 

 dorsal furrow. The glabella is evenly convex laterally. It is highly 

 convex longitudinally, the curvature being concentrated in the forward 

 third. The fixigenes are only slightly curved in cross section and 

 slope down from the relatively shallow dorsal furrow at about the 

 same angle as the lateral slopes of the glabella. Surface punctate. 



Honey Creek limestone; (loc. 37V) West Timbered Hills, Arbuckle 

 Mountains, Oklahoma. 



Holofype.— v. S.N. M. No. 108632. 



