56 
BULLETIN OF THE LABORATORIES 
Head unknown ; thorax consisting of nine slightly convex seg- 
ments, the axial and pleural portion having about the the same width, 
length slightly over twice the width ; pygidium over one-half as long 
as broad, very flat, consisting of about ten coalesced segments, axial 
lobe very wide, considerably over one-third the entire width, termi- 
nating obtusely near the margin ; pleural surface gently convex with 
about nine obvious segments which are low and separated by shallow 
grooves. There are some indications that there may have been a broad 
plane border, in which case the proportions would correspond to P. 
shumardi quite nearly. It is quite unlikely that it is identical with 
that species, however. 
One mile east of Harlam, Licking Co., in shale 200-300 feet from 
the base of the Waverly. 
PROETUS MINUTUS, sp. n. 
(Plate I, Fig. 7, a, b.) 
An exceedingly small species quite unlike its associates. 
General form broadly oval, head as long as the pygidium ; glab- 
ella large with very small, strongly marked basal lobes and elevated 
median lobe, which is narrow, with parallel sides and terminates at 
some distance from the front margin. The markings are not displayed, 
the surface being exfoliated. Cervical 'suture deep, cervical segment 
apparently narrow. Median lobe of glabella nearly twice as long as 
broad. Thorax with nine segments, very distinctly trilobed. Pygid- 
ium two-thirds as long as broad, with a very wide concave border, 
axial segments eleven or twelve, pleural segments eleven. Pygidium 
rather flat with rounded costae which disappear toward the margin. 
Moot’s run. Licking Co., O. 
Genus Phaetho.xides, Angelin, 1878. 
The present writer had gone so far as to separate the species now 
to be described with Phillipsia lodiensis. Meek, as constituting a sep- 
arate genus allied to Brachymetopus when the adoption and modifica- 
tion by Prof. Hall of the genus Phaethonides fell under his notice. 
Hail, however, does not entirely agree with its founder in the applica- 
tion of the name to the group for which Barrande proposed Phaethon. 
