Foerste.l 
266 
[May 1, 
An imperfect glabella from the Clinton of Hanover, Ind., dif- 
fers from the Ohio specimens by being less curved antero-posteri- 
orly, and having the frontal lobe less convex so that this lobe ap- 
pears broader. From the occipital groove to the anterior margin 
of the head it measures 20.6 mm. ; across the frontal lobe 15 
mm. ; across the posterior lobes 22.3 mm. 
Near Wilmington (Todd’s Fork?), Ohio specimens having this 
form of glabella are common. 
At Collinsville, Ala., a few small pygidia of some form of Cal- 
ymene were found which perhaps belonged to this variety. 
At Catoosa Station and Dug G-ap, Ga., Yogdes found what 
seems to be the same form, although at first referred to Calymene 
Clintoni. 
This same form occurs again at Cumberland Gap, Tenn.,in such 
numbers that the following description is drawn up entirely from 
them : 
Glabella moderately convex, not much elevated above the plane 
of the fixed cheeks and anterior border of the head. Posterior 
pair of lobes semi-globular, very distinct ; median pair about half 
the size of the latter, also quite distinct, sometimes also semi- 
globular, but usually more of an ovoid form with the longer axis 
almost perpendicular to that of the glabella. Anterior lobe small, 
weakly separated from the frontal lobe by a groove of variable 
distinctness. Anterior margin of the glabella of moderate curva- 
ture, separated from the anterior upturned border by a deep groove 
which also defines the anterior margin of the fixed cheeks. Dor- 
sal furrows very well marked and usually fairly deep and quite 
narrow. The fixed cheeks usually projecting slightly towards the 
glabella at the middle pair of lobes. The occipital furrow also dis- 
tinct. There is scarcely any curvature of the head antero -poste- 
riorly. 
The measurements of a typical specimen are as follows : Length 
from occipital margin to anterior margin of glabella 11.3 mm.; 
to anterior margin of groove 12.7 mm.; to anterior margin of 
head 15 mm. Width of glabella including posterior lobes 11.7 
mm. ; at frontal lobe 6.5 mm. Width between palpebral furrow of 
the fixed cheeks 16.2 mm. 
The pygidium is semi-circular anteriorly, almost straight along 
the posterior margin, there being a moderate curvature forward 
along the lateral extremities. Lobes, segments and pleurae are 
all well defined by grooves, and the furrows along the backs of the 
