OF DENISON UNIVERSITY. 
6i 
in his Paleontology of Nebraska, with Shumard’s P. major. The for- 
mer are characterized by a rather unusual length of pigidia, while those 
of the latter are broad. The pigidium Fig. i, Plate II, of the Nebras- 
ka report closely resembles Grififithides obsoletus. 
Phillipsia cliftonensis , Shumard. 
Pigidium small, semi-elliptical, gibbous, width greater than the 
length; axial lobe elevated longitudinally, gently arched, dorsum 
slightly depressed, width at forward extremity about equal to one lat- 
eral lobe exclusive of smooth margin, gradually tapering and termi- 
nating in a blunt point posteriorly; rings from 13 to 14, sub-granulose, 
separated by distinctly impressed furrows ; lateral lobes angulated near 
the middle, flattened above and on the sides, well defined from the 
margin by a shallow, but distinct furrow; segments 7, rounded, sepa- 
rated by distinct linear sulci ; margin moderately wide and regularly 
convex. Length, .23; width, .25 ; heigt, .11 ; height of axial lobe, 
.04; length, .19. 
This is also from the upper coal measures of Kansas. 
Phillipsia san£am01'isis . Meek and Worthen. ^ 
(Plate V, Fig. 13.) 
Sub-ovate ; cephalic shield convex, regularly rounded in front, 
cheeks produced into carinated processes less than one-third entire 
median length ef head; glabella convex, sub-inflated, axial suture 
moderately well defined, greatest convexity behind the middle, length 
width, sides nearly parallel ; posterior lobes large, prominent ; sec- 
ond lateral furrow curved, oblique, anterior furrows nearly obsolete ; 
cervical segment and suture well defined; facial suture quite well de- 
fined, intersecting posterior margin midway to angle. Eyes rather 
large, half as long as glabella, exclusive of cervical segment, promi- 
nent ; palpebral lobes convex, resting upon the eye like a lid. 
Pigidium semi-elliptical, rather convex, a little wider than long, 
narrow and rather longer than head, narrowing posteriorly, abruptly 
rounded behind; mesial lobe prominent, a little flattened at each side, 
narrower than the lateral lobes, from which it is separated by a broad 
furrow, about two-thirds entire length of glabella ; lateral lobes less 
prominent, abruptly convex at outer side ; segments 9 or 10, all termi- 
nating abruptly at the edge of a broad marginal zone, which is widest 
