54 
BULLETIN OF THE LABORATORIES 
n 
PHILLIPSIA MERAMACENSIS. Shumard. 
(Plate I, Fig. 6.) 
Our knowledge of this species rests on the single pygidium from 
an isolated expetsure on a horizon about seventy feet below the Chester 
and apparently no to 120 feet above congl. II. It is undoubtedly 
near the horizon of P. serraticaudata. In as much as P. meram- 
acensis was described from strata referred to the Chester, the close 
stratigraphical relation to acknowledged Chester rocks in Ohio is sug- 
gestive of an inference suggested by other facts, i. e. , that the suppos- 
ed hiatus above the Waverly does not in reality exist or at least is not 
as great as supposed. The Chester at this place is but about twenty- 
five feet thick and is followed without unconformity by sandy shales 
and a micaceous sandstone introducing the coal-measures. For de- 
scription see Bui. Den. Univ. vol. iii, p. 28, and Plate XI of the same 
volume but published with Vol. IV. 
PHILLIPSIA (PROETUS) AURICULATUS, Hall 
(Plate I, Fig. 14.) 
Proetus missouriensis ^ Shumard. 
Phillipsia shumardi, Herrick. 
For as complete a description as now possible see Bui. Den. 
Univ. vol. ii, p. 69. 
The range of this species is for the most part limited to the free- 
stone of middle Waverly, but a specimen has been found immediately 
below conglomerate I and a variety not at present specifically sep- 
arable occurs up to one hundred feet above conglomerate II. See 
opening sentences of present article for history of the species. 
PHILLIPSIA (PROETUS^ PR>ECURSOR, Herrick. 
(Plate I, Fig. i.) 
This is a beautiful and characteristic species and seems quite rig- 
orously limited to a zone scarcely 30 feet thick about seventy-five feet 
below conglomerate I. Specimens have been found only in one lo- 
cality four miles west of Granville, where, however, the species is 
abundant. 
Our P. praecursor differs from P. haldemani in having the genal 
angles produced. It is much like P. microcephalus but has a shorter 
glabella and smaller basal lobes. 
