OF DENISON UNIVERSITY. 
53 
ly convex, marked by the same number of annuli as the median one, 
which are continuous to the very narrowed abrupt border. Segments 
ornamented along the posterior margin of the elevated portion by 
short, sharp, curved spines. This species is remarkable also for the 
distance of the convex, rather prominent termination of the median 
lobe from the free margin. 
Length of glabella, lo mm., width, 7.5 mm., distance from third 
lateral furrow to front 4.5 mm. Length of pygidium, 9 mm., width, 
10 to II mip. 
Seventy-five to one hundred feet above congl. II, Newark, 100 
feet above congl. II, Rushville, and 108 feet above congl. II, in 
Richland Co. The horizon from which this species comes is well 
marked and restricted. 
PHILLIPSIA (?) CONSORS. sp. n. 
(Plate I, Fig. 16, a, b, c.) 
Closely related apparently with P. serraticaudata. Her. Glabella 
almost exactly as in that species, length to width, as 8.5 to 5.5 at basal 
lobes ; narrowed in front, depressed, marked by three lateral grooves, 
surface very densely marked by pustules of two sizes. From the spe- 
cies quoted the glabella differs in being rather longer proportionally, 
and more densely marked. The anterior part -of head was not seen 
but very likely the border is narrow. Pygidium strongly elevated, 
parabolic, with a very narrow, smooth border ; median lobe reaching 
rather nearer the posterior of pygidium than in P. serraticaudatus, 
composed of from 9 to 12 segments which are narrow, separated by 
concave grooves and ornamented by numerous perpendicular (not 
curved) pustules ; lateral lobes strongly curved with about nine obvious 
segments ornamented as above. 
Length of median lobe of glabella, 8.5 mm., width, 5.5 mm., 
length of pygidium, 9 mm., width, 10 mm. When flattened the py- 
gidium approaches in proportions those of P. serraticaudata. 
Five specimens were obtained at Lodi while looking for P. lodi- 
ensis, but there can be no possibility of our specimens belonging to 
that form. The structure of the head a little suggests P. prsecursor, 
above the horizon of which it lies. 
